hawkmoth vs hummingbird moth

hawkmoth and hummingbird moth both are nouns.

Word	Noun	Adjective	Verb	Adverb
hawkmoth	Yes	No	No	No
hummingbird moth	Yes	No	No	No

As nouns, hawkmoth and hummingbird moth are synonyms defined as:

hawkmoth and hummingbird moth: any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed

Other synonyms of hawkmoth include hawk moth, sphingid, sphinx moth.

hawkmoth (noun)	hummingbird moth (noun)
any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed	any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed