Exhalation is the process of releasing air from the lungs, and it can be referred to by several different terms. ODOR (4 letters) is a smell that can be detected in the air, and EMANATION (9 letters) is the act of releasing something into the atmosphere. EMISSION (8 letters) is the act of sending out something, such as a gas or vapor, and BREATH (6 letters) is the air that is exhaled. FUME (4 letters) is a type of gas that is released, and EFFLUVIUM (9 letters) is a noxious vapor or gas. STEAM (5 letters) is a type of vapor that is created when water is heated.