ascent vs heave

ascent and heave both are nouns.

Word	Noun	Adjective	Verb	Adverb
ascent	Yes	No	No	No
heave	Yes	No	Yes	No

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

Other hyponyms of ascent include levitation, heaving, climb, mount, soar, zoom.

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

ascent (noun)	heave (noun)
the act of changing location in an upward direction	throwing something heavy (with great effort)
a movement upward; rise above the ground	the act of lifting something with great effort
an upward slope or grade (as in a road)	the act of raising something
	an involuntary spasm of ineffectual vomiting
	(geology) a horizontal dislocation
	an upward movement (especially a rhythmical rising and falling)

ascent (verb)	heave (verb)
	make an unsuccessful effort to vomit; strain to vomit
	breathe noisily, as when one is exhausted
	bend out of shape, as under pressure or from heat
	utter a sound, as with obvious effort
	lift or elevate
	throw with great effort
	rise and move, as in waves or billows
	move or cause to move in a specified way, direction, or position