descent vs dive

descent and dive both are nouns.

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

As nouns, dive is a hyponym of descent; that is, dive is a word with a more specific, narrower meaning than descent:

Other hyponyms of descent include jump, parachuting, nose dive, nosedive, abseil, rappel, swoop, crash dive, drop, collapse, flop.

descent (noun)	dive (noun)
the act of changing your location in a downward direction	a steep nose-down descent by an aircraft
properties attributable to your ancestry	a headlong plunge into water
a movement downward	a cheap disreputable nightclub or dance hall
the hereditary derivation of an individual
a downward slope or bend
the kinship relation between an individual and the individual's progenitors