mounting vs ascension

mounting and ascension both are nouns.

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

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

mounting: an event that involves rising to a higher point (as in altitude or temperature or intensity etc.)
ascension: a movement upward; rise above the ground

Other hypernyms of mounting include ascent, rise, rising.

mounting (noun)	ascension (noun)
framework used for support or display	the act of changing location in an upward direction
an event that involves rising to a higher point (as in altitude or temperature or intensity etc.)	a movement upward; rise above the ground
	(astronomy) the rising of a star above the horizon