regimen vs regime

regimen and regime both are nouns.

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

As nouns, regimen and regime are synonyms defined as:

regimen and regime: (medicine) a systematic plan for therapy (often including diet)

regimen (noun)	regime (noun)
(medicine) a systematic plan for therapy (often including diet)	(medicine) a systematic plan for therapy (often including diet)
	the organization that is the governing authority of a political unit