The term 'coat with gold' can be solved by two crossword solutions: PLATE (5 letters) and GILD (4 letters). PLATE is a noun that refers to a thin, flat piece of metal or other material, usually circular. GILD is a verb that means to cover something with a thin layer of gold or other precious metal. Both terms are used to describe the process of coating an object with gold, which is often done for decorative purposes.