celom vs bodily cavity

celom and bodily cavity both are nouns.

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

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

celom: 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 celom include cavity, cavum.

celom (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