Respiration is the process of taking in oxygen and releasing carbon dioxide. INHALATION (10 letters) is the act of BREATHING in air, while EXPIRATION (10 letters) is the act of BREATHING out air. INSPIRATION (11 letters) is the act of drawing air into the lungs, while WHEEZE (6 letters) is a whistling sound made when BREATHING out. EXHALATION (10 letters) is the act of exhaling air from the lungs, while BREATHING (9 letters) is the act of inhaling and exhaling air. Finally, BREATH (6 letters) is the air that is inhaled and exhaled during respiration.