cavity vs sawpit

cavity and sawpit both are nouns.

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

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

cavity: a sizeable hole (usually in the ground)
sawpit: a pit over which lumber is positioned to be sawed by two men with a long two-handed saw

Other hyponyms of cavity include trou-de-loup, barbecue pit, borrow pit, divot, fire pit, quicksand, sandpit, tar pit.

cavity (noun)	sawpit (noun)
(anatomy) a natural hollow or sinus within the body	a pit over which lumber is positioned to be sawed by two men with a long two-handed saw
a sizeable hole (usually in the ground)
soft decayed area in a tooth; progressive decay can lead to the death of a tooth
space that is surrounded by something