firebomb

nouns

a bomb that is designed to start fires; is most effective against flammable targets (such as fuel)
firebomb, incendiary, incendiary bomb

verbs

attack with incendiary bombs
"The rioters fire-bombed the stores"
firebomb
is a type of (narrower)
throw bombs at or attack with bombs
"The Americans bombed Dresden"
bomb, bombard