hummingbird moth vs moth

hummingbird moth and moth both are nouns.

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

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

hummingbird moth: any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed
moth: typically crepuscular or nocturnal insect having a stout body and feathery or hairlike antennae

hummingbird moth (noun)	moth (noun)
any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed	typically crepuscular or nocturnal insect having a stout body and feathery or hairlike antennae