Bomb-A container filled with explosive, incendiary material, smoke, gas, or other destructive substance, designed to explode on impact or when detonated by a time mechanism, remote-control device, or lit fuseCluster-A group of similar objects growing closely together.
oxymoron: a figure of speech by which a locution produces an incongruous, seemingly self-contradictory effect, as in "cruel kindness" or "to make haste slowly."