nosedive vs descent

nosedive and descent both are nouns.

Word	Noun	Adjective	Verb	Adverb
nosedive	Yes	No	Yes	No
descent	Yes	No	No	No

As nouns, descent is a hypernym of nosedive; that is, descent is a word with a broader meaning than nosedive:

nosedive (noun)	descent (noun)
a steep nose-down descent by an aircraft	the act of changing your location in a downward direction
a sudden sharp drop or rapid decline	properties attributable to your ancestry
	a movement downward
	the hereditary derivation of an individual
	a downward slope or bend
	the kinship relation between an individual and the individual's progenitors

nosedive (verb)	descent (verb)
plunge nose first; drop with the nose or front first, of aircraft