digit vs dactyl

digit and dactyl both are nouns.

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

As nouns, digit and dactyl are synonyms defined as:

digit and dactyl: a finger or toe in human beings or corresponding body part in other vertebrates

digit (noun)	dactyl (noun)
a finger or toe in human beings or corresponding body part in other vertebrates	a finger or toe in human beings or corresponding body part in other vertebrates
one of the elements that collectively form a system of numeration	a metrical unit with stressed-unstressed-unstressed syllables
the length of breadth of a finger used as a linear measure