seditious vs subversive

seditious is not a noun while subversive is a noun.

Word	Noun	Adjective	Verb	Adverb
seditious	No	Yes	No	No
subversive	Yes	Yes	No	No

As adjectives, seditious and subversive are synonyms defined as:

seditious and subversive: in opposition to a civil authority or government

Other synonyms of seditious include insurgent.

seditious (noun)	subversive (noun)
	a radical supporter of political or social revolution

seditious (adjective)	subversive (adjective)
in opposition to a civil authority or government	in opposition to a civil authority or government
arousing to action or rebellion