digit vs integer

digit and integer both are nouns.

Word	Noun	Adjective	Verb	Adverb
digit	Yes	No	No	No
integer	Yes	No	No	No

As nouns, integer is a hypernym of digit; that is, integer is a word with a broader meaning than digit:

Other hypernyms of digit include whole number.

digit (noun)	integer (noun)
a finger or toe in human beings or corresponding body part in other vertebrates	any of the natural numbers (positive or negative) or zero
one of the elements that collectively form a system of numeration
the length of breadth of a finger used as a linear measure