A bomb that is designed to start fires; is most effective against flammable targets (such as fuel) WordNet 3.0 & Open English WordNet

Incendiary weapons, incendiary devices, incendiary munitions, or incendiary bombs are weapons designed to start fires or destroy sensitive equipment using fire, using materials such as napalm, thermite, magnesium powder, chlorine trifluoride, or white phosphorus. Wikipedia

A device designed to cause fires Wikipedia Disambiguation

Bomb designed to start fires Wikidata

A bomb that is designed to start fires; is most effective against flammable targets (such as fuel). OmegaWiki

A weapon that causes fire, an incendiary weapon. Wiktionary

Weapon. Wiktionary (translation)