dive vs go down

dive is a noun but go down is not a noun.

Word	Noun	Adjective	Verb	Adverb
dive	Yes	No	Yes	No
go down	No	No	Yes	No

As verbs, go down is a hypernym of dive; that is, go down is a word with a broader meaning than dive:

Other hypernyms of dive include come down, descend, fall.

dive (noun)	go down (noun)
a steep nose-down descent by an aircraft
a headlong plunge into water
a cheap disreputable nightclub or dance hall

dive (verb)	go down (verb)
drop steeply	grow smaller
swim under water	stop operating
plunge into water	be defeated
	be ingested
	go under
	disappear beyond the horizon
	move downward and lower, but not necessarily all the way
	be recorded or remembered