Chest rattle is a term used to describe a rattling sound that can be heard when someone breathes. It is usually caused by an accumulation of mucus in the lungs, and can be a symptom of a variety of illnesses. RALE is a four-letter word meaning a rattling sound, SABERS is a six-letter word meaning a type of sword, and MARACA is a six-letter word referring to a percussion instrument that produces a rattling sound when shaken. Together, these words form the term chest rattle.