dactyl vs appendage

dactyl and appendage both are nouns.

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

As nouns, appendage is a hypernym of dactyl; that is, appendage is a word with a broader meaning than dactyl:

dactyl: a finger or toe in human beings or corresponding body part in other vertebrates
appendage: an external body part that projects from the body

Other hypernyms of dactyl include extremity, member.

dactyl (noun)	appendage (noun)
a finger or toe in human beings or corresponding body part in other vertebrates	a part that is joined to something larger
a metrical unit with stressed-unstressed-unstressed syllables	an external body part that projects from the body
	a natural prolongation or projection from a part of an organism either animal or plant