incendiary vs combustible

incendiary and combustible both are nouns.

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

incendiary (noun)	combustible (noun)
a bomb that is designed to start fires; is most effective against flammable targets (such as fuel)	a substance that can be burned to provide heat or power
a criminal who illegally sets fire to property

incendiary (adjective)	combustible (adjective)
involving deliberate burning of property	capable of igniting and burning
capable of catching fire spontaneously or causing fires or burning readily
arousing to action or rebellion