digit vs minimus

digit and minimus both are nouns.

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

As nouns, minimus is a hyponym of digit; that is, minimus is a word with a more specific, narrower meaning than digit:

digit: a finger or toe in human beings or corresponding body part in other vertebrates
minimus: the fifth digit; the little finger or little toe

Other hyponyms of digit include finger, toe.

digit (noun)	minimus (noun)
a finger or toe in human beings or corresponding body part in other vertebrates	the fifth digit; the little finger or little toe
one of the elements that collectively form a system of numeration
the length of breadth of a finger used as a linear measure