nose dive vs dive

nose dive and dive both are nouns.

Word	Noun	Adjective	Verb	Adverb
nose dive	Yes	No	No	No
dive	Yes	No	Yes	No

As nouns, nose dive and dive are synonyms defined as:

Other synonyms of nose dive include nosedive.

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