Definition of incendiary:

a criminal who illegally sets fire to property

Synonyms of incendiary:

arsonist, firebug, firebomb, agitator, bomb, inflammatory, firebrand, rabble-rousing, incendiary bomb, munition

Opposite/Antonyms of incendiary:

incombustible, fireproof, conciliatory, noncombustible, unprovocative, medical, accessory, complaisant, elastic

Sentence/Example of incendiary:

That is why, to save my life, I had to be an incendiary at times, and at others a footpad.