"firebomb" in the noun sense
1. incendiary bomb, incendiary, firebomb
a bomb that is designed to start fires is most effective against flammable targets (such as fuel)
"firebomb" in the verb sense
1. firebomb
attack with incendiary bombs
"The rioters fire-bombed the stores"
Source: WordNet® (An amazing lexical database of English)
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