self-determination vs self-government

self-determination and self-government both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-determination	Yes	No	No	No
self-government	Yes	No	No	No

As nouns, self-determination and self-government are synonyms defined as:

self-determination and self-government: government of a political unit by its own people

Other synonyms of self-determination include self-rule.

self-determination (noun)	self-government (noun)
determination of one's own fate or course of action without compulsion	government of a political unit by its own people
government of a political unit by its own people