tympanum vs cavity

tympanum and cavity both are nouns.

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

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

Other hypernyms of tympanum include bodily cavity, cavum.

tympanum (noun)	cavity (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	a sizeable hole (usually in the ground)
the main cavity of the ear; between the eardrum and the inner ear	soft decayed area in a tooth; progressive decay can lead to the death of a tooth
	space that is surrounded by something