uplifting vs ascension

uplifting and ascension both are nouns.

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

As nouns, ascension is a hypernym of uplifting; that is, ascension is a word with a broader meaning than uplifting:

Other hypernyms of uplifting include ascent, rise, rising.

uplifting (noun)	ascension (noun)
the rise of something	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