tympanum vs cavum

tympanum and cavum both are nouns.

Word	Noun	Adjective	Verb	Adverb
tympanum	Yes	No	No	No
cavum	Yes	No	No	No

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

Other hypernyms of tympanum include bodily cavity, cavity.

tympanum (noun)	cavum (noun)
a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it	(anatomy) a natural hollow or sinus within the body
the membrane in the ear that vibrates to sound
the main cavity of the ear; between the eardrum and the inner ear