uterine cavity vs cavum

uterine cavity and cavum both are nouns.

Word	Noun	Adjective	Verb	Adverb
uterine cavity	Yes	No	No	No
cavum	Yes	No	No	No

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

uterine cavity: the space inside the uterus between the cervical canal and the Fallopian tubes
cavum: (anatomy) a natural hollow or sinus within the body

Other hypernyms of uterine cavity include bodily cavity, cavity.

uterine cavity (noun)	cavum (noun)
the space inside the uterus between the cervical canal and the Fallopian tubes	(anatomy) a natural hollow or sinus within the body