Crusher

Noun

 * 1) That which crushes.

Thesaurus
KO, cheese grater, clincher, comminutor, conclusive argument, death stroke, deathblow, end-all, ender, final stroke, finisher, finishing stroke, floorer, granulator, grater, grinder, kayo, kayo punch, knockdown argument, knockout, knockout blow, kominuter, last dab, levigator, masher, mill, millstone, mortar and pestle, nutmeg grater, pestle, pulverizer, quern, quernstone, quietus, rock crusher, roller, settler, shredder, sockdolager, steamroller, stopper, triturator