Engine sound is the collective term for the noises made by an engine, which can range from a PURR to a ROAR. The crossword solutions for engine sound include 'PURR' (4 letters), 'CHUG' (4 letters), 'COUGH' (5 letters), 'PING' (4 letters), 'VROOM' (5 letters), 'ROAR' (4 letters), 'THRUM' (5 letters), 'HUM' (3 letters), 'DRONE' (5 letters), 'KNOCK' (5 letters), 'SIREN' (5 letters), 'WHINE' (5 letters), and 'PUTTPUTT' (8 letters). These words describe the various sounds that an engine can make, from the low HUM of a diesel engine to the high-pitched WHINE of a turbocharged engine.