diff --git a/book/src/implemented-proposals/durable-tx-nonces.md b/book/src/implemented-proposals/durable-tx-nonces.md
index e6648b5f4..43d470e6f 100644
--- a/book/src/implemented-proposals/durable-tx-nonces.md
+++ b/book/src/implemented-proposals/durable-tx-nonces.md
@@ -26,7 +26,7 @@ account data. A transaction is now constructed in the normal way, but with the
 following additional requirements:
 
   1) The durable nonce value is used in the `recent_blockhash` field
-  2) A `NonceAdvance` instruction is the first issued in the transaction
+  2) An `AdvanceNonceAccount` instruction is the first issued in the transaction
 
 ### Contract Mechanics
 
@@ -67,7 +67,7 @@ A client wishing to use this feature starts by creating a nonce account under
 the system program. This account will be in the `Uninitialized` state with no
 stored hash, and thus unusable.
 
-To initialize a newly created account, a `NonceInitialize` instruction must be
+To initialize a newly created account, an `InitializeNonceAccount` instruction must be
 issued. This instruction takes one parameter, the `Pubkey` of the account's
 [authority](../offline-signing/durable-nonce.md#nonce-authority). Nonce accounts
 must be [rent-exempt](rent.md#two-tiered-rent-regime) to meet the data-persistence
@@ -76,27 +76,27 @@ deposited before they can be initialized. Upon successful initialization, the
 cluster's most recent blockhash is stored along with specified nonce authority
 `Pubkey`.
 
-The `NonceAdvance` instruction is used to manage the account's stored nonce
+The `AdvanceNonceAccount` instruction is used to manage the account's stored nonce
 value. It stores the cluster's most recent blockhash in the account's state data,
 failing if that matches the value already stored there. This check prevents
 replaying transactions within the same block.
 
 Due to nonce accounts' [rent-exempt](rent.md#two-tiered-rent-regime) requirement,
 a custom withdraw instruction is used to move funds out of the account.
-The `NonceWithdraw` instruction takes a single argument, lamports to withdraw,
+The `WithdrawNonceAccount` instruction takes a single argument, lamports to withdraw,
 and enforces rent-exemption by preventing the account's balance from falling
 below the rent-exempt minimum. An exception to this check is if the final balance
 would be zero lamports, which makes the account eligible for deletion. This
 account closure detail has an additional requirement that the stored nonce value
-must not match the cluster's most recent blockhash, as per `NonceAdvance`.
+must not match the cluster's most recent blockhash, as per `AdvanceNonceAccount`.
 
 The account's [nonce authority](../offline-signing/durable-nonce.md#nonce-authority)
-can be changed using the `NonceAuthorize` instruction. It takes one parameter,
+can be changed using the `AuthorizeNonceAccount` instruction. It takes one parameter,
 the `Pubkey` of the new authority. Executing this instruction grants full
 control over the account and its balance to the new authority.
 
 {% hint style="info" %}
-`NonceAdvance`, `NonceWithdraw` and `NonceAuthorize` all require the current
+`AdvanceNonceAccount`, `WithdrawNonceAccount` and `AuthorizeNonceAccount` all require the current
 [nonce authority](../offline-signing/durable-nonce.md#nonce-authority) for the
 account to sign the transaction.
 {% endhint %}
@@ -108,7 +108,7 @@ an extant `recent_blockhash` on the transaction and prevent fee theft via
 failed transaction replay, runtime modifications are necessary.
 
 Any transaction failing the usual `check_hash_age` validation will be tested
-for a Durable Transaction Nonce. This is signaled by including a `NonceAdvance`
+for a Durable Transaction Nonce. This is signaled by including a `AdvanceNonceAccount`
 instruction as the first instruction in the transaction.
 
 If the runtime determines that a Durable Transaction Nonce is in use, it will
@@ -124,10 +124,10 @@ If all three of the above checks succeed, the transaction is allowed to continue
 validation.
 
 Since transactions that fail with an `InstructionError` are charged a fee and
-changes to their state rolled back, there is an opportunity for fee theft if a
-`NonceAdvance` instruction is reverted. A malicious validator could replay the
+changes to their state rolled back, there is an opportunity for fee theft if an
+`AdvanceNonceAccount` instruction is reverted. A malicious validator could replay the
 failed transaction until the stored nonce is successfully advanced. Runtime
 changes prevent this behavior. When a durable nonce transaction fails with an
-`InstructionError` aside from the `NonceAdvance` instruction, the nonce account
+`InstructionError` aside from the `AdvanceNonceAccount` instruction, the nonce account
 is rolled back to its pre-execution state as usual. Then the runtime advances
 its nonce value and the advanced nonce account stored as if it succeeded.
diff --git a/runtime/src/nonce_utils.rs b/runtime/src/nonce_utils.rs
index 5929973da..31fb02d6c 100644
--- a/runtime/src/nonce_utils.rs
+++ b/runtime/src/nonce_utils.rs
@@ -24,7 +24,7 @@ pub fn transaction_uses_durable_nonce(tx: &Transaction) -> Option<&CompiledInstr
             }
         })
         .filter(|maybe_ix| match limited_deserialize(&maybe_ix.data) {
-            Ok(SystemInstruction::NonceAdvance) => true,
+            Ok(SystemInstruction::AdvanceNonceAccount) => true,
             _ => false,
         })
 }
diff --git a/runtime/src/system_instruction_processor.rs b/runtime/src/system_instruction_processor.rs
index 5ea9f5782..685fd241a 100644
--- a/runtime/src/system_instruction_processor.rs
+++ b/runtime/src/system_instruction_processor.rs
@@ -236,14 +236,14 @@ pub fn process_instruction(
             let to = next_keyed_account(keyed_accounts_iter)?;
             transfer_lamports(from, to, lamports)
         }
-        SystemInstruction::NonceAdvance => {
+        SystemInstruction::AdvanceNonceAccount => {
             let me = &mut next_keyed_account(keyed_accounts_iter)?;
             me.nonce_advance(
                 &RecentBlockhashes::from_keyed_account(next_keyed_account(keyed_accounts_iter)?)?,
                 &signers,
             )
         }
-        SystemInstruction::NonceWithdraw(lamports) => {
+        SystemInstruction::WithdrawNonceAccount(lamports) => {
             let me = &mut next_keyed_account(keyed_accounts_iter)?;
             let to = &mut next_keyed_account(keyed_accounts_iter)?;
             me.nonce_withdraw(
@@ -254,7 +254,7 @@ pub fn process_instruction(
                 &signers,
             )
         }
-        SystemInstruction::NonceInitialize(authorized) => {
+        SystemInstruction::InitializeNonceAccount(authorized) => {
             let me = &mut next_keyed_account(keyed_accounts_iter)?;
             me.nonce_initialize(
                 &authorized,
@@ -262,7 +262,7 @@ pub fn process_instruction(
                 &Rent::from_keyed_account(next_keyed_account(keyed_accounts_iter)?)?,
             )
         }
-        SystemInstruction::NonceAuthorize(nonce_authority) => {
+        SystemInstruction::AuthorizeNonceAccount(nonce_authority) => {
             let me = &mut next_keyed_account(keyed_accounts_iter)?;
             me.nonce_authorize(&nonce_authority, &signers)
         }
@@ -902,7 +902,7 @@ mod tests {
             super::process_instruction(
                 &Pubkey::default(),
                 &mut [],
-                &serialize(&SystemInstruction::NonceAdvance).unwrap()
+                &serialize(&SystemInstruction::AdvanceNonceAccount).unwrap()
             ),
             Err(InstructionError::NotEnoughAccountKeys),
         );
@@ -918,7 +918,7 @@ mod tests {
                     true,
                     &mut Account::default(),
                 ),],
-                &serialize(&SystemInstruction::NonceAdvance).unwrap(),
+                &serialize(&SystemInstruction::AdvanceNonceAccount).unwrap(),
             ),
             Err(InstructionError::NotEnoughAccountKeys),
         );
@@ -937,7 +937,7 @@ mod tests {
                         &mut Account::default(),
                     ),
                 ],
-                &serialize(&SystemInstruction::NonceAdvance).unwrap(),
+                &serialize(&SystemInstruction::AdvanceNonceAccount).unwrap(),
             ),
             Err(InstructionError::InvalidArgument),
         );
@@ -964,7 +964,7 @@ mod tests {
                     &mut sysvar::rent::create_account(1, &Rent::free()),
                 ),
             ],
-            &serialize(&SystemInstruction::NonceInitialize(Pubkey::default())).unwrap(),
+            &serialize(&SystemInstruction::InitializeNonceAccount(Pubkey::default())).unwrap(),
         )
         .unwrap();
         assert_eq!(
@@ -981,7 +981,7 @@ mod tests {
                         ),
                     ),
                 ],
-                &serialize(&SystemInstruction::NonceAdvance).unwrap(),
+                &serialize(&SystemInstruction::AdvanceNonceAccount).unwrap(),
             ),
             Ok(()),
         );
@@ -1006,7 +1006,7 @@ mod tests {
             super::process_instruction(
                 &Pubkey::default(),
                 &mut [],
-                &serialize(&SystemInstruction::NonceWithdraw(42)).unwrap(),
+                &serialize(&SystemInstruction::WithdrawNonceAccount(42)).unwrap(),
             ),
             Err(InstructionError::NotEnoughAccountKeys),
         );
@@ -1022,7 +1022,7 @@ mod tests {
                     true,
                     &mut Account::default(),
                 ),],
-                &serialize(&SystemInstruction::NonceWithdraw(42)).unwrap(),
+                &serialize(&SystemInstruction::WithdrawNonceAccount(42)).unwrap(),
             ),
             Err(InstructionError::NotEnoughAccountKeys),
         );
@@ -1042,7 +1042,7 @@ mod tests {
                         &mut Account::default(),
                     ),
                 ],
-                &serialize(&SystemInstruction::NonceWithdraw(42)).unwrap(),
+                &serialize(&SystemInstruction::WithdrawNonceAccount(42)).unwrap(),
             ),
             Err(InstructionError::InvalidArgument),
         );
@@ -1070,7 +1070,7 @@ mod tests {
                     ),
                     KeyedAccount::new(&sysvar::rent::id(), false, &mut Account::default(),),
                 ],
-                &serialize(&SystemInstruction::NonceWithdraw(42)).unwrap(),
+                &serialize(&SystemInstruction::WithdrawNonceAccount(42)).unwrap(),
             ),
             Err(InstructionError::InvalidArgument),
         );
@@ -1102,7 +1102,7 @@ mod tests {
                         &mut sysvar::rent::create_account(1, &Rent::free())
                     ),
                 ],
-                &serialize(&SystemInstruction::NonceWithdraw(42)).unwrap(),
+                &serialize(&SystemInstruction::WithdrawNonceAccount(42)).unwrap(),
             ),
             Ok(()),
         );
@@ -1114,7 +1114,7 @@ mod tests {
             super::process_instruction(
                 &Pubkey::default(),
                 &mut [],
-                &serialize(&SystemInstruction::NonceInitialize(Pubkey::default())).unwrap(),
+                &serialize(&SystemInstruction::InitializeNonceAccount(Pubkey::default())).unwrap(),
             ),
             Err(InstructionError::NotEnoughAccountKeys),
         );
@@ -1130,7 +1130,7 @@ mod tests {
                     true,
                     &mut nonce_state::create_account(1_000_000),
                 ),],
-                &serialize(&SystemInstruction::NonceInitialize(Pubkey::default())).unwrap(),
+                &serialize(&SystemInstruction::InitializeNonceAccount(Pubkey::default())).unwrap(),
             ),
             Err(InstructionError::NotEnoughAccountKeys),
         );
@@ -1153,7 +1153,7 @@ mod tests {
                         &mut Account::default(),
                     ),
                 ],
-                &serialize(&SystemInstruction::NonceInitialize(Pubkey::default())).unwrap(),
+                &serialize(&SystemInstruction::InitializeNonceAccount(Pubkey::default())).unwrap(),
             ),
             Err(InstructionError::InvalidArgument),
         );
@@ -1180,7 +1180,7 @@ mod tests {
                     ),
                     KeyedAccount::new(&sysvar::rent::id(), false, &mut Account::default(),),
                 ],
-                &serialize(&SystemInstruction::NonceInitialize(Pubkey::default())).unwrap(),
+                &serialize(&SystemInstruction::InitializeNonceAccount(Pubkey::default())).unwrap(),
             ),
             Err(InstructionError::InvalidArgument),
         );
@@ -1211,7 +1211,7 @@ mod tests {
                         &mut sysvar::rent::create_account(1, &Rent::free())
                     ),
                 ],
-                &serialize(&SystemInstruction::NonceInitialize(Pubkey::default())).unwrap(),
+                &serialize(&SystemInstruction::InitializeNonceAccount(Pubkey::default())).unwrap(),
             ),
             Ok(()),
         );
@@ -1238,14 +1238,14 @@ mod tests {
                     &mut sysvar::rent::create_account(1, &Rent::free()),
                 ),
             ],
-            &serialize(&SystemInstruction::NonceInitialize(Pubkey::default())).unwrap(),
+            &serialize(&SystemInstruction::InitializeNonceAccount(Pubkey::default())).unwrap(),
         )
         .unwrap();
         assert_eq!(
             super::process_instruction(
                 &Pubkey::default(),
                 &mut [KeyedAccount::new(&Pubkey::default(), true, &mut nonce_acc,),],
-                &serialize(&SystemInstruction::NonceAuthorize(Pubkey::default(),)).unwrap(),
+                &serialize(&SystemInstruction::AuthorizeNonceAccount(Pubkey::default(),)).unwrap(),
             ),
             Ok(()),
         );
diff --git a/sdk/src/system_instruction.rs b/sdk/src/system_instruction.rs
index f55409011..fd66b78e1 100644
--- a/sdk/src/system_instruction.rs
+++ b/sdk/src/system_instruction.rs
@@ -92,15 +92,15 @@ pub enum SystemInstruction {
         space: u64,
         program_id: Pubkey,
     },
-    /// `NonceAdvance` consumes a stored nonce, replacing it with a successor
+    /// `AdvanceNonceAccount` consumes a stored nonce, replacing it with a successor
     ///
     /// Expects 2 Accounts:
     ///     0 - A NonceAccount
     ///     1 - RecentBlockhashes sysvar
     ///
     /// The current authority must sign a transaction executing this instrucion
-    NonceAdvance,
-    /// `NonceWithdraw` transfers funds out of the nonce account
+    AdvanceNonceAccount,
+    /// `WithdrawNonceAccount` transfers funds out of the nonce account
     ///
     /// Expects 4 Accounts:
     ///     0 - A NonceAccount
@@ -112,8 +112,8 @@ pub enum SystemInstruction {
     /// account balance above the rent exempt reserve or at zero.
     ///
     /// The current authority must sign a transaction executing this instruction
-    NonceWithdraw(u64),
-    /// `NonceInitialize` drives state of Uninitalized NonceAccount to Initialized,
+    WithdrawNonceAccount(u64),
+    /// `InitializeNonceAccount` drives state of Uninitalized NonceAccount to Initialized,
     /// setting the nonce value.
     ///
     /// Expects 3 Accounts:
@@ -126,8 +126,8 @@ pub enum SystemInstruction {
     ///
     /// No signatures are required to execute this instruction, enabling derived
     /// nonce account addresses
-    NonceInitialize(Pubkey),
-    /// `NonceAuthorize` changes the entity authorized to execute nonce instructions
+    InitializeNonceAccount(Pubkey),
+    /// `AuthorizeNonceAccount` changes the entity authorized to execute nonce instructions
     /// on the account
     ///
     /// Expects 1 Account:
@@ -136,7 +136,7 @@ pub enum SystemInstruction {
     /// The `Pubkey` parameter identifies the entity to authorize
     ///
     /// The current authority must sign a transaction executing this instruction
-    NonceAuthorize(Pubkey),
+    AuthorizeNonceAccount(Pubkey),
 }
 
 pub fn create_account(
@@ -256,7 +256,7 @@ pub fn create_nonce_account_with_seed(
         ),
         Instruction::new(
             system_program::id(),
-            &SystemInstruction::NonceInitialize(*authority),
+            &SystemInstruction::InitializeNonceAccount(*authority),
             vec![
                 AccountMeta::new(*nonce_pubkey, false),
                 AccountMeta::new_readonly(recent_blockhashes::id(), false),
@@ -282,7 +282,7 @@ pub fn create_nonce_account(
         ),
         Instruction::new(
             system_program::id(),
-            &SystemInstruction::NonceInitialize(*authority),
+            &SystemInstruction::InitializeNonceAccount(*authority),
             vec![
                 AccountMeta::new(*nonce_pubkey, false),
                 AccountMeta::new_readonly(recent_blockhashes::id(), false),
@@ -300,7 +300,7 @@ pub fn nonce_advance(nonce_pubkey: &Pubkey, authorized_pubkey: &Pubkey) -> Instr
     .with_signer(authorized_pubkey);
     Instruction::new(
         system_program::id(),
-        &SystemInstruction::NonceAdvance,
+        &SystemInstruction::AdvanceNonceAccount,
         account_metas,
     )
 }
@@ -320,7 +320,7 @@ pub fn nonce_withdraw(
     .with_signer(authorized_pubkey);
     Instruction::new(
         system_program::id(),
-        &SystemInstruction::NonceWithdraw(lamports),
+        &SystemInstruction::WithdrawNonceAccount(lamports),
         account_metas,
     )
 }
@@ -333,7 +333,7 @@ pub fn nonce_authorize(
     let account_metas = vec![AccountMeta::new(*nonce_pubkey, false)].with_signer(authorized_pubkey);
     Instruction::new(
         system_program::id(),
-        &SystemInstruction::NonceAuthorize(*new_authority),
+        &SystemInstruction::AuthorizeNonceAccount(*new_authority),
         account_metas,
     )
 }