dive vs come down

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

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

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

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

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

dive (verb)	come down (verb)
drop steeply	get sick
swim under water	be the essential element
plunge into water	criticize or reprimand harshly
	move downward and lower, but not necessarily all the way
	fall from clouds