diff --git a/.internal/createCompounder.js b/.internal/createCompounder.js
deleted file mode 100644
index 8fc76fa41..000000000
--- a/.internal/createCompounder.js
+++ /dev/null
@@ -1,19 +0,0 @@
-import words from '../words.js'
-
-/** Used to match apostrophes. */
-const reApos = /['\u2019]/g
-
-/**
- * Creates a function like `camelCase`.
- *
- * @private
- * @param {Function} callback The function to combine each word.
- * @returns {Function} Returns the new compounder function.
- */
-function createCompounder(callback) {
-  return (string) => (
-    words(`${ string }`.replace(reApos, '')).reduce(callback, '')
-  )
-}
-
-export default createCompounder
diff --git a/camelCase.js b/camelCase.js
index 44814a851..91b40abc9 100644
--- a/camelCase.js
+++ b/camelCase.js
@@ -1,5 +1,5 @@
 import capitalize from './capitalize.js'
-import createCompounder from './.internal/createCompounder.js'
+import words from './words.js'
 
 /**
  * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
@@ -20,9 +20,11 @@ import createCompounder from './.internal/createCompounder.js'
  * camelCase('__FOO_BAR__')
  * // => 'fooBar'
  */
-const camelCase = createCompounder((result, word, index) => {
-  word = word.toLowerCase()
-  return result + (index ? capitalize(word) : word)
-})
+const camelCase = (string) => (
+  words(`${ string }`.replace(/['\u2019]/g, '')).reduce((result, word, index) => {
+    word = word.toLowerCase()
+    return result + (index ? capitalize(word) : word)
+  }, '')
+)
 
 export default camelCase
diff --git a/kebabCase.js b/kebabCase.js
index a296a6e8d..4f942cbc4 100644
--- a/kebabCase.js
+++ b/kebabCase.js
@@ -1,4 +1,4 @@
-import createCompounder from './.internal/createCompounder.js'
+import words from './words.js'
 
 /**
  * Converts `string` to
@@ -20,8 +20,10 @@ import createCompounder from './.internal/createCompounder.js'
  * kebabCase('__FOO_BAR__')
  * // => 'foo-bar'
  */
-const kebabCase = createCompounder((result, word, index) =>
-  result + (index ? '-' : '') + word.toLowerCase()
+const kebabCase = (string) => (
+  words(`${ string }`.replace(/['\u2019]/g, '')).reduce((result, word, index) => (
+    result + (index ? '-' : '') + word.toLowerCase()
+  ), '')
 )
 
 export default kebabCase
diff --git a/lowerCase.js b/lowerCase.js
index 11f28eba2..616557b93 100644
--- a/lowerCase.js
+++ b/lowerCase.js
@@ -1,4 +1,4 @@
-import createCompounder from './.internal/createCompounder.js'
+import words from './words.js'
 
 /**
  * Converts `string`, as space separated words, to lower case.
@@ -19,8 +19,10 @@ import createCompounder from './.internal/createCompounder.js'
  * lowerCase('__FOO_BAR__')
  * // => 'foo bar'
  */
-const lowerCase = createCompounder((result, word, index) =>
-  result + (index ? ' ' : '') + word.toLowerCase()
+const lowerCase = (string) => (
+  words(`${ string }`.replace(/['\u2019]/g, '')).reduce((result, word, index) => (
+    result + (index ? ' ' : '') + word.toLowerCase()
+  ), '')
 )
 
 export default lowerCase
diff --git a/snakeCase.js b/snakeCase.js
index 7a4cc2667..fa3e61ed5 100644
--- a/snakeCase.js
+++ b/snakeCase.js
@@ -1,4 +1,4 @@
-import createCompounder from './.internal/createCompounder.js'
+import words from './words.js'
 
 /**
  * Converts `string` to
@@ -20,8 +20,10 @@ import createCompounder from './.internal/createCompounder.js'
  * snakeCase('--FOO-BAR--')
  * // => 'foo_bar'
  */
-const snakeCase = createCompounder((result, word, index) =>
-  result + (index ? '_' : '') + word.toLowerCase()
+const snakeCase = (string) => (
+  words(`${ string }`.replace(/['\u2019]/g, '')).reduce((result, word, index) => (
+    result + (index ? '_' : '') + word.toLowerCase()
+  ), '')
 )
 
 export default snakeCase
diff --git a/startCase.js b/startCase.js
index 4c6b6e855..32bf70557 100644
--- a/startCase.js
+++ b/startCase.js
@@ -1,5 +1,5 @@
-import createCompounder from './.internal/createCompounder.js'
 import upperFirst from './upperFirst.js'
+import words from './words.js'
 
 /**
  * Converts `string` to
@@ -21,8 +21,10 @@ import upperFirst from './upperFirst.js'
  * startCase('__FOO_BAR__')
  * // => 'FOO BAR'
  */
-const startCase = createCompounder((result, word, index) =>
-  result + (index ? ' ' : '') + upperFirst(word)
+const startCase = (string) => (
+  words(`${ string }`.replace(/['\u2019]/g, '')).reduce((result, word, index) => (
+    result + (index ? ' ' : '') + upperFirst(word)
+  ), '')
 )
 
 export default startCase
diff --git a/upperCase.js b/upperCase.js
index 97bf1b091..c75f22232 100644
--- a/upperCase.js
+++ b/upperCase.js
@@ -1,4 +1,4 @@
-import createCompounder from './.internal/createCompounder.js'
+import words from './words.js'
 
 /**
  * Converts `string`, as space separated words, to upper case.
@@ -19,8 +19,10 @@ import createCompounder from './.internal/createCompounder.js'
  * upperCase('__foo_bar__')
  * // => 'FOO BAR'
  */
-const upperCase = createCompounder((result, word, index) =>
-  result + (index ? ' ' : '') + word.toUpperCase()
+const upperCase = (string) => (
+  words(`${ string }`.replace(/['\u2019]/g, '')).reduce((result, word, index) => (
+    result + (index ? ' ' : '') + word.toUpperCase()
+  ), '')
 )
 
 export default upperCase