diff --git a/README.md b/README.md
index 4c63c71..80dba45 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Tests & Quality: [![Build Status](https://travis-ci.org/wapmorgan/Morphos.svg)](
         3. Last names
         4. Nouns
     2. Pluralization
-    3. Number creation
+    3. Numeral creation
     4. Cases
 4. English
     1. Pluralization
@@ -72,7 +72,7 @@ morphos\
                 LastNamesDeclension
                 GeneralDeclension
                 Plurality
-                CardinalNumber
+                CardinalNumeral
 ```
 
 ## Declension
@@ -345,24 +345,24 @@ echo $count.' '.Plurality::pluralize($word, $count, false);
 // result: 10 домов
 ```
 
-## Number creation
+## Numeral creation
 
 All number creation classes are similar and have two common methods:
 
 - `string getForm($number, $case)` - Get one form of a number.
 - `array getForms($number)` - Get all forms of a number.
 
-### Cardinal numbers (`CardinalNumber`)
+### Cardinal numbers (`CardinalNumeral`)
 
 _Creation of cardinal numerals in russian language._
 
 Create declension class object:
 
 ```php
-use morphos\Russian\CardinalNumber;
+use morphos\Russian\CardinalNumeral;
 use morphos\Russian\Cases;
 
-$cardinal = new CardinalNumber();
+$cardinal = new CardinalNumeral();
 ```
 
 Get text representation of a number:
diff --git a/src/NumberCreation.php b/src/NumeralCreation.php
similarity index 73%
rename from src/NumberCreation.php
rename to src/NumeralCreation.php
index 7422a41..af276d4 100644
--- a/src/NumberCreation.php
+++ b/src/NumeralCreation.php
@@ -1,7 +1,7 @@
 <?php
 namespace morphos;
 
-class NumberCreation implements Cases {
+class NumeralCreation implements Cases {
     public function getForms($number) {}
     public function getForm($number, $case) {}
 }
diff --git a/src/Russian/CardinalNumber.php b/src/Russian/CardinalNumeral.php
similarity index 99%
rename from src/Russian/CardinalNumber.php
rename to src/Russian/CardinalNumeral.php
index 95c8b62..204dca6 100644
--- a/src/Russian/CardinalNumber.php
+++ b/src/Russian/CardinalNumeral.php
@@ -1,12 +1,12 @@
 <?php
 namespace morphos\Russian;
 
-use morphos\NumberCreation;
+use morphos\NumeralCreation;
 
 /**
  * Rules are from http://www.fio.ru/pravila/grammatika/sklonenie-imen-chislitelnykh/
  */
-class CardinalNumber extends NumberCreation implements Cases {
+class CardinalNumeral extends NumeralCreation implements Cases {
     use RussianLanguage;
 
     protected $words = array(
diff --git a/tests/Russian/CardinalNumberTest.php b/tests/Russian/CardinalNumeralTest.php
similarity index 96%
rename from tests/Russian/CardinalNumberTest.php
rename to tests/Russian/CardinalNumeralTest.php
index e27612c..d2cb718 100644
--- a/tests/Russian/CardinalNumberTest.php
+++ b/tests/Russian/CardinalNumeralTest.php
@@ -3,13 +3,13 @@
 require __DIR__.'/../../vendor/autoload.php';
 
 use morphos\Russian\Cases;
-use morphos\Russian\CardinalNumber;
+use morphos\Russian\CardinalNumeral;
 
-class CardinalNumberTest extends \PHPUnit_Framework_TestCase {
+class CardinalNumeralTest extends \PHPUnit_Framework_TestCase {
     protected $cardinal;
 
     public function setUp() {
-        $this->cardinal = new CardinalNumber();
+        $this->cardinal = new CardinalNumeral();
     }
 
     /**