seditious vs incendiary

seditious is not a noun while incendiary is a noun.

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

As adjectives, seditious and incendiary are synonyms defined as:

Other synonyms of seditious include incitive, inflammatory, instigative, rabble-rousing.

seditious (noun)	incendiary (noun)
	a bomb that is designed to start fires; is most effective against flammable targets (such as fuel)
	a criminal who illegally sets fire to property

seditious (adjective)	incendiary (adjective)
in opposition to a civil authority or government	involving deliberate burning of property
arousing to action or rebellion	capable of catching fire spontaneously or causing fires or burning readily
	arousing to action or rebellion