grater n 1: utensil with sharp perforations for shredding foods (as vegetables or cheese)
Grater \Grat"er\, a. [From Qrate, v.] One who, or that which, grates; especially, an instrument or utensil with a rough, indented surface, for rubbing off small particles of any substance; as a grater for nutmegs. [1913 Webster]
21 Moby Thesaurus words for "grater": cheese grater, comminutor, crusher, granulator, grinder, kominuter, levigator, masher, mill, millstone, mortar and pestle, nutmeg grater, pestle, pulverizer, quern, quernstone, rock crusher, roller, shredder, steamroller, triturator