Incendiary

Part of speech: noun (n.)

1. Any person who maliciously sets fire to a building or other valuable or other valuable property.

2. A person who excites or inflames factions, and promotes quarrels or sedition; an agitator; an exciter. Several cities . . . drove them out as incendiaries. Bentley.

Part of speech: adjective (a.)

1. Of or pertaining to incendiarism, or the malicious burning of valuable property; as, incendiary material; as incendiary crime.

2. Tending to excite or inflame factions, sedition, or quarrel; inflammatory; seditious. Paley. Incendiary shell, a bombshell. See Carcass, 4.