cardinal numeral vs cardinal number

cardinal numeral and cardinal number both are nouns.

Word	Noun	Adjective	Verb	Adverb
cardinal numeral	Yes	No	No	No
cardinal number	Yes	No	No	No

As nouns, cardinal numeral and cardinal number are synonyms defined as:

cardinal numeral and cardinal number: (grammar) A word that expresses a countable quantity.

cardinal numeral (noun)	cardinal number (noun)
(grammar) A word that expresses a countable quantity.	(grammar) A word that expresses a countable quantity.
	the number of elements in a mathematical set; denotes a quantity but not the order