autonomous vs self-governing

autonomous and self-governing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
autonomous	No	Yes	No	No
self-governing	No	Yes	No	No

As adjectives, autonomous and self-governing are synonyms defined as:

autonomous and self-governing: (of political bodies) not controlled by outside forces

Other synonyms of autonomous include independent, sovereign.

autonomous (adjective)	self-governing (adjective)
(of political bodies) not controlled by outside forces	(of political bodies) not controlled by outside forces
(of persons) free from external control and constraint in e.g. action and judgment
existing as an independent entity