sphinx moth vs moth

sphinx moth and moth both are nouns.

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

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

sphinx 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

sphinx 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