diff --git a/src/plonk/circuit.rs b/src/plonk/circuit.rs
index dc84cbb..8f959cf 100644
--- a/src/plonk/circuit.rs
+++ b/src/plonk/circuit.rs
@@ -225,7 +225,7 @@ pub trait Circuit<F: Field> {
 #[derive(Clone, Debug)]
 pub enum Expression<F> {
     /// This is a constant polynomial
-    Const(F),
+    Constant(F),
     /// This is a fixed column queried at a certain relative location
     Fixed(usize),
     /// This is an advice (witness) column queried at a certain relative location
@@ -245,7 +245,7 @@ impl<F: Field> Expression<F> {
     /// operations.
     pub fn evaluate<T>(
         &self,
-        const_column: &impl Fn(F) -> T,
+        constant: &impl Fn(F) -> T,
         fixed_column: &impl Fn(usize) -> T,
         advice_column: &impl Fn(usize) -> T,
         instance_column: &impl Fn(usize) -> T,
@@ -254,13 +254,13 @@ impl<F: Field> Expression<F> {
         scaled: &impl Fn(T, F) -> T,
     ) -> T {
         match self {
-            Expression::Const(scalar) => const_column(*scalar),
+            Expression::Constant(scalar) => constant(*scalar),
             Expression::Fixed(index) => fixed_column(*index),
             Expression::Advice(index) => advice_column(*index),
             Expression::Instance(index) => instance_column(*index),
             Expression::Sum(a, b) => {
                 let a = a.evaluate(
-                    const_column,
+                    constant,
                     fixed_column,
                     advice_column,
                     instance_column,
@@ -269,7 +269,7 @@ impl<F: Field> Expression<F> {
                     scaled,
                 );
                 let b = b.evaluate(
-                    const_column,
+                    constant,
                     fixed_column,
                     advice_column,
                     instance_column,
@@ -281,7 +281,7 @@ impl<F: Field> Expression<F> {
             }
             Expression::Product(a, b) => {
                 let a = a.evaluate(
-                    const_column,
+                    constant,
                     fixed_column,
                     advice_column,
                     instance_column,
@@ -290,7 +290,7 @@ impl<F: Field> Expression<F> {
                     scaled,
                 );
                 let b = b.evaluate(
-                    const_column,
+                    constant,
                     fixed_column,
                     advice_column,
                     instance_column,
@@ -302,7 +302,7 @@ impl<F: Field> Expression<F> {
             }
             Expression::Scaled(a, f) => {
                 let a = a.evaluate(
-                    const_column,
+                    constant,
                     fixed_column,
                     advice_column,
                     instance_column,
@@ -318,7 +318,7 @@ impl<F: Field> Expression<F> {
     /// Compute the degree of this polynomial
     pub fn degree(&self) -> usize {
         match self {
-            Expression::Const(_) => 0,
+            Expression::Constant(_) => 0,
             Expression::Fixed(_) => 1,
             Expression::Advice(_) => 1,
             Expression::Instance(_) => 1,
diff --git a/src/plonk/lookup/prover.rs b/src/plonk/lookup/prover.rs
index a574a17..5abe772 100644
--- a/src/plonk/lookup/prover.rs
+++ b/src/plonk/lookup/prover.rs
@@ -96,7 +96,7 @@ impl<F: FieldExt> Argument<F> {
                 .iter()
                 .map(|expression| {
                     expression.evaluate(
-                        &|scalar| pk.vk.domain.const_lagrange(scalar),
+                        &|scalar| pk.vk.domain.constant_lagrange(scalar),
                         &|index| {
                             let query = pk.vk.cs.fixed_queries[index];
                             let column_index = query.0.index();
@@ -138,7 +138,7 @@ impl<F: FieldExt> Argument<F> {
                 .iter()
                 .map(|expression| {
                     expression.evaluate(
-                        &|scalar| pk.vk.domain.const_extended(scalar),
+                        &|scalar| pk.vk.domain.constant_extended(scalar),
                         &|index| fixed_cosets[index].clone(),
                         &|index| advice_cosets[index].clone(),
                         &|index| instance_cosets[index].clone(),
diff --git a/src/plonk/prover.rs b/src/plonk/prover.rs
index a4597f7..8d1c055 100644
--- a/src/plonk/prover.rs
+++ b/src/plonk/prover.rs
@@ -373,7 +373,7 @@ pub fn create_proof<C: CurveAffine, T: TranscriptWrite<C>, ConcreteCircuit: Circ
                     // Custom constraints
                     .chain(meta.gates.iter().map(move |(_, poly)| {
                         poly.evaluate(
-                            &|scalar| pk.vk.domain.const_extended(scalar),
+                            &|scalar| pk.vk.domain.constant_extended(scalar),
                             &|index| pk.fixed_cosets[index].clone(),
                             &|index| advice.advice_cosets[index].clone(),
                             &|index| instance.instance_cosets[index].clone(),
diff --git a/src/poly/domain.rs b/src/poly/domain.rs
index 2976ac3..ce530c2 100644
--- a/src/poly/domain.rs
+++ b/src/poly/domain.rs
@@ -178,7 +178,7 @@ impl<G: Group> EvaluationDomain<G> {
     }
 
     /// Returns a constant polynomial in the Lagrange coefficient basis
-    pub fn const_lagrange(&self, scalar: G) -> Polynomial<G, LagrangeCoeff> {
+    pub fn constant_lagrange(&self, scalar: G) -> Polynomial<G, LagrangeCoeff> {
         Polynomial {
             values: vec![scalar; self.n as usize],
             _marker: PhantomData,
@@ -196,7 +196,7 @@ impl<G: Group> EvaluationDomain<G> {
 
     /// Returns a constant polynomial in the extended Lagrange coefficient
     /// basis
-    pub fn const_extended(&self, scalar: G) -> Polynomial<G, ExtendedLagrangeCoeff> {
+    pub fn constant_extended(&self, scalar: G) -> Polynomial<G, ExtendedLagrangeCoeff> {
         Polynomial {
             values: vec![scalar; self.extended_len()],
             _marker: PhantomData,