government vs upheaval

government and upheaval both are nouns.

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

government (noun)	upheaval (noun)
the act of governing; exercising authority	disturbance usually in protest
(government) the system or form by which a community or other political unit is governed	(geology) a rise of land to a higher elevation (as in the process of mountain building)
the study of government of states and other political units	a state of violent disturbance and disorder (as in politics or social conditions generally)
the organization that is the governing authority of a political unit	a violent disturbance