cakehole vs oral cavity

cakehole and oral cavity both are nouns.

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

As nouns, oral cavity is a hypernym of cakehole; that is, oral cavity is a word with a broader meaning than cakehole:

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

Other hypernyms of cakehole include mouth, oral fissure, rima oris.

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