What is a compound word beginning with cough rain out?

A compound Word that begins with "cough" is "coughdrop." It combines "cough" and "drop" to refer to a type of lozenge used to soothe throat irritation. If you're looking for something starting with "rain," you might consider "raincoat," which merges "rain" and "coat" to describe a waterproof garment. However, "cough rain out" does not form a recognizable compound Word.