regime vs polity

regime and polity both are nouns.

Word	Noun	Adjective	Verb	Adverb
regime	Yes	No	No	No
polity	Yes	No	No	No

As nouns, polity is a hypernym of regime; that is, polity is a word with a broader meaning than regime:

regime: the organization that is the governing authority of a political unit
polity: a politically organized unit

regime (noun)	polity (noun)
(medicine) a systematic plan for therapy (often including diet)	shrewd or crafty management of public affairs
the organization that is the governing authority of a political unit	a politically organized unit
	the form of government of a social organization