socket vs cavity

socket and cavity both are nouns.

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

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

Other hypernyms of socket include bodily cavity, cavum.

socket (noun)	cavity (noun)
a receptacle into which an electric device can be inserted	(anatomy) a natural hollow or sinus within the body
receptacle where something (a pipe or probe or end of a bone) is inserted	a sizeable hole (usually in the ground)
a bony hollow into which a structure fits	soft decayed area in a tooth; progressive decay can lead to the death of a tooth
	space that is surrounded by something