Platinize is a verb that means to coat or cover with a layer of platinum. Synonyms for platinize include platinate, platinumize, platinumplate, and platitudinize. The word platinumize can also be used in a broader sense to mean to make something more valuable or prestigious, just as platinum is a precious metal. Other synonyms that convey a similar meaning to platinize include gilding, coating, encasing, laminating, and veneering. These words all describe the process of adding a thin layer or surface to an object to enhance its appearance or properties.