oral cavity vs maw

oral cavity and maw both are nouns.

Word	Noun	Adjective	Verb	Adverb
oral cavity	Yes	No	No	No
maw	Yes	No	No	No

As nouns, maw is a hyponym of oral cavity; that is, maw is a word with a more specific, narrower meaning than oral cavity:

oral cavity: the opening through which food is taken in and vocalizations emerge
maw: informal terms for the mouth

Other hyponyms of oral cavity include cakehole, gob, hole, trap, yap.

oral cavity (noun)	maw (noun)
the opening through which food is taken in and vocalizations emerge	informal terms for the mouth