subversive vs seditious

subversive is a noun but seditious is not a noun.

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

As adjectives, subversive and seditious are synonyms defined as:

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

Other synonyms of subversive include insurgent.

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

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