cavity

(n) a sizeable hole (usually in the ground)
- they dug a pit to bury the body
pit,
(n) space that is surrounded by something enclosed space,
(n) soft decayed area in a tooth; progressive decay can lead to the death of a tooth caries, dental caries, tooth decay,
(n) (anatomy) a natural hollow or sinus within the body bodily cavity, cavum,

pit enclosed space caries dental caries tooth decay bodily cavity cavum

Cavia cavil

caviar

cavity resonator cavity wall