ascending vs climb

ascending and climb both are nouns.

Word	Noun	Adjective	Verb	Adverb
ascending	Yes	Yes	No	No
climb	Yes	No	Yes	No

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

Other hyponyms of ascending include levitation, heave, heaving, mount, soar, zoom.

ascending (noun)	climb (noun)
the act of changing location in an upward direction	the act of climbing something
	an event that involves rising to a higher point (as in altitude or temperature or intensity etc.)
	an upward slope or grade (as in a road)

ascending (adjective)	climb (adjective)
moving or going or growing upward

ascending (verb)	climb (verb)
	go up or advance
	increase in value or to a higher point
	improve one's social status
	go upward with gradual or continuous progress
	move with effort, by grasping
	slope upward