whole number vs integer

whole number and integer both are nouns.

Word	Noun	Adjective	Verb	Adverb
whole number	Yes	No	No	No
integer	Yes	No	No	No

As nouns, whole number and integer are synonyms defined as:

whole number and integer: any of the natural numbers (positive or negative) or zero

whole number (noun)	integer (noun)
any of the natural numbers (positive or negative) or zero	any of the natural numbers (positive or negative) or zero