cecropia moth vs saturniid

cecropia moth and saturniid both are nouns.

Word	Noun	Adjective	Verb	Adverb
cecropia moth	Yes	No	No	No
saturniid	Yes	No	No	No

As nouns, saturniid is a hypernym of cecropia moth; that is, saturniid is a word with a broader meaning than cecropia moth:

cecropia moth: North American silkworm moth; larvae feed on the leaves of forest trees
saturniid: large brightly colored and usually tropical moth; larvae spin silken cocoons

Other hypernyms of cecropia moth include saturniid moth.

cecropia moth (noun)	saturniid (noun)
North American silkworm moth; larvae feed on the leaves of forest trees	large brightly colored and usually tropical moth; larvae spin silken cocoons