coelom vs bodily cavity

coelom and bodily cavity both are nouns.

Word	Noun	Adjective	Verb	Adverb
coelom	Yes	No	No	No
bodily cavity	Yes	No	No	No

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

coelom: a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity
bodily cavity: (anatomy) a natural hollow or sinus within the body

Other hypernyms of coelom include cavity, cavum.

coelom (noun)	bodily cavity (noun)
a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity	(anatomy) a natural hollow or sinus within the body