upheaval vs ascent

upheaval and ascent both are nouns.

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

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

upheaval: (geology) a rise of land to a higher elevation (as in the process of mountain building)
ascent: a movement upward; rise above the ground

Other hypernyms of upheaval include ascension, rise, rising.

upheaval (noun)	ascent (noun)
disturbance usually in protest	the act of changing location in an upward direction
(geology) a rise of land to a higher elevation (as in the process of mountain building)	a movement upward; rise above the ground
a state of violent disturbance and disorder (as in politics or social conditions generally)	an upward slope or grade (as in a road)
a violent disturbance