tempestuousness vs upheaval

tempestuousness and upheaval both are nouns.

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

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

tempestuousness: a state of agitation or turbulent change or development
upheaval: a state of violent disturbance and disorder (as in politics or social conditions generally)

Other hypernyms of tempestuousness include Sturm und Drang, turbulence.

tempestuousness (noun)	upheaval (noun)
a state of wild storminess	disturbance usually in protest
a state of agitation or turbulent change or development	(geology) a rise of land to a higher elevation (as in the process of mountain building)
	a state of violent disturbance and disorder (as in politics or social conditions generally)
	a violent disturbance