ascending vs heaving

ascending and heaving both are nouns.

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

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

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

ascending (noun)	heaving (noun)
the act of changing location in an upward direction	throwing something heavy (with great effort)
	breathing heavily (as after exertion)
	the act of lifting something with great effort
	an upward movement (especially a rhythmical rising and falling)

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