hollow vs cavity

hollow and cavity both are nouns.

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

As nouns, cavity is a hyponym of hollow; that is, cavity is a word with a more specific, narrower meaning than hollow:

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

Other hypernyms of hollow include enclosed space.

hollow (noun)	cavity (noun)
a depression hollowed out of solid matter	(anatomy) a natural hollow or sinus within the body
a small valley between mountains	a sizeable hole (usually in the ground)
a cavity or space in something	soft decayed area in a tooth; progressive decay can lead to the death of a tooth
	space that is surrounded by something

hollow (adjective)	cavity (adjective)
not solid; having a space or gap or cavity
lacking in substance or character
devoid of significance or force
as if echoing in a hollow space

hollow (verb)	cavity (verb)
remove the interior of
remove the inner part or the core of