hawk moth vs hawkmoth

hawk moth and hawkmoth both are nouns.

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

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

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

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

hawk moth (noun)	hawkmoth (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