socket vs acetabulum

socket and acetabulum both are nouns.

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

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

socket: a bony hollow into which a structure fits
acetabulum: the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint

Other hyponyms of socket include hip socket, alveolus, tooth socket, cotyloid cavity.

socket (noun)	acetabulum (noun)
a receptacle into which an electric device can be inserted	the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint
receptacle where something (a pipe or probe or end of a bone) is inserted
a bony hollow into which a structure fits