Planish is a term used in the field of metalwork, which means to polish or smooth something by using a hammer or a metalworking tool. Synonyms for planish include burnish, buff, refine, gloss, shine, and buff up. Burnish involves rubbing a surface with a hard or smooth tool until it has a shiny and smooth surface. Buffing refers to polishing a surface with a buffing wheel or a cloth until it shines. Refining means making something better by removing impurities or imperfections. Glossing involves adding a glossy or shiny finish to a surface. Shining refers to making something bright and reflective. Buffing up means polishing something until it is shiny and smooth.