unity vs digit

unity and digit both are nouns.

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

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

Other hypernyms of unity include figure.

unity (noun)	digit (noun)
the quality of being united into one	a finger or toe in human beings or corresponding body part in other vertebrates
the smallest whole number or a numeral representing this number	one of the elements that collectively form a system of numeration
an undivided or unbroken completeness or totality with nothing wanting	the length of breadth of a finger used as a linear measure