rave-up vs gathering

rave-up and gathering both are nouns.

Word	Noun	Adjective	Verb	Adverb
rave-up	Yes	No	No	No
gathering	Yes	No	No	No

As nouns, gathering is a hypernym of rave-up; that is, gathering is a word with a broader meaning than rave-up:

Other hypernyms of rave-up include assemblage.

rave-up (noun)	gathering (noun)
a large overnight dance party where electronic music is played and illegal drugs are usually taken	the social act of assembling
a raucous gathering	the act of gathering something
	sewing consisting of small folds or puckers made by pulling tight a thread in a line of stitching
	a group of persons together in one place