descent vs abseil

descent and abseil both are nouns.

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

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

descent: the act of changing your location in a downward direction
abseil: (mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body

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

descent (noun)	abseil (noun)
the act of changing your location in a downward direction	(mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body
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

descent (verb)	abseil (verb)
	descend by means of a rappel