bombycid moth vs silkworm moth

bombycid moth and silkworm moth both are nouns.

Word	Noun	Adjective	Verb	Adverb
bombycid moth	Yes	No	No	No
silkworm moth	Yes	No	No	No

As nouns, bombycid moth and silkworm moth are synonyms defined as:

bombycid moth and silkworm moth: moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk

Other synonyms of bombycid moth include bombycid.

bombycid moth (noun)	silkworm moth (noun)
moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk	moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk
	any silkworm moth of the family Saturniidae