Synonyms: whir, whirr, whirring, birr
Definition: sound of something in rapid motion
Usage: whir of a bird's wings; the whir of the propellers
Similar words: sound
Definition: the sudden occurrence of an audible event
Usage: the sound awakened them
Synonyms: purr, birr, whir, whirr, whiz, whizz
Definition: make a soft swishing sound
Usage: the motor whirred; the car engine purred
Definition: make a certain noise or sound
Usage: She went `Mmmmm'; The gun went `bang'