uphill vs ascent

uphill and ascent both are nouns.

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

As nouns, ascent is a hypernym of uphill; that is, ascent is a word with a broader meaning than uphill:

Other hypernyms of uphill include acclivity, climb, raise, rise, upgrade.

uphill (noun)	ascent (noun)
the upward slope of a hill	the act of changing location in an upward direction
	a movement upward; rise above the ground
	an upward slope or grade (as in a road)

uphill (adjective)	ascent (adjective)
sloping upward

uphill (adverb)	ascent (adverb)
upward on a hill or incline
against difficulties