five vs digit

five and digit both are nouns.

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

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

Other hypernyms of five include figure.

five (noun)	digit (noun)
a playing card or a domino or a die whose upward face shows five pips	a finger or toe in human beings or corresponding body part in other vertebrates
a team that plays basketball	one of the elements that collectively form a system of numeration
the cardinal number that is the sum of four and one	the length of breadth of a finger used as a linear measure

five (adjective)	digit (adjective)
being one more than four