The term COLD COAT can be broken down into two crossword solutions: RIME (4 letters) and FROST (5 letters). RIME is a type of FROST that forms when water vapor in the air freezes onto surfaces. It is usually seen on cold mornings or evenings and is composed of tiny ice crystals. FROST, on the other hand, is a thin layer of ice that forms on surfaces when temperatures drop below freezing. It is often seen on windows, plants, and other surfaces during cold weather.