ascension vs ascending

ascension and ascending both are nouns.

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

As nouns, ascension and ascending are synonyms defined as:

ascension and ascending: the act of changing location in an upward direction

Other synonyms of ascension include ascent, rise.

ascension (noun)	ascending (noun)
the act of changing location in an upward direction	the act of changing location in an upward direction
a movement upward; rise above the ground
(astronomy) the rising of a star above the horizon

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