Letters that make whir
h, r, i, w are letters that make 'whir'
whirr, whirs, whirl are words created by adding a letter to 'whir'
2 possible definitions for 'whir'
Under this definition, whir is a verb and has the following properties:
"the motor whirred", "the car engine purred"
Under this definition, whir is a noun and has the following properties:
'whir' can be a type of sound.
"whir of a bird's wings", "the whir of the propellers"