integer vs whole number

integer and whole number both are nouns.

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

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

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

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