1 annihilate, assassinate, blow away (slang, chiefly U.S.) bump off (slang) butcher, destroy, dispatch, do away with, do in (slang) eradicate, execute, exterminate, extirpate, knock off (slang) liquidate, massacre, murder, neutralize, obliterate, slaughter, slay, take out (slang) take (someone's) life, waste (informal) wipe from the face of the earth (informal)
2 (figurative) cancel, cease, deaden, defeat, extinguish, halt, quash, quell, ruin, scotch, smother, stifle, still, stop, suppress, veto