cinnabar moth vs arctiid

cinnabar moth and arctiid both are nouns.

Word	Noun	Adjective	Verb	Adverb
cinnabar moth	Yes	No	No	No
arctiid	Yes	No	No	No

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

cinnabar moth: large red-and-black European moth; larvae feed on leaves of ragwort; introduced into United States to control ragwort
arctiid: stout-bodied broad-winged moth with conspicuously striped or spotted wings; larvae are hairy caterpillars

Other hypernyms of cinnabar moth include arctiid moth.

cinnabar moth (noun)	arctiid (noun)
large red-and-black European moth; larvae feed on leaves of ragwort; introduced into United States to control ragwort	stout-bodied broad-winged moth with conspicuously striped or spotted wings; larvae are hairy caterpillars