ascend vs slope

ascend is not a noun while slope is a noun.

Word	Noun	Adjective	Verb	Adverb
ascend	No	No	Yes	No
slope	Yes	No	Yes	No

As verbs, slope is a hypernym of ascend; that is, slope is a word with a broader meaning than ascend:

Other hypernyms of ascend include incline, pitch.

ascend (noun)	slope (noun)
	the property possessed by a line or surface that departs from the horizontal
	an elevated geological formation

ascend (verb)	slope (verb)
slope upwards	be at an angle
travel up
come up, of celestial bodies
go along towards (a river's) source
move to a better position in life or to a better job
appear to be moving upward, as by means of tendrils
become king or queen
go back in order of genealogical succession