Answer:

vroom

Answer	Crossword Clue
VROOM	Motorcycle noise
VROOM	Auto race noise
VROOM	Motor's roar

VROOM	Hot rod's sound
VROOM	Racecar sound
VROOM	Indy 500 sound
VROOM	Speedway sound
VROOM	Speeding sound
VROOM	Formula One sound
VROOM	Engine sound
VROOM	Race-car engine sound

VROOM	Racetrack sound
VROOM	Engine noise
VROOM	Souped-up engine sound
VROOM	Dragging sound
VROOM	Drag race sound
VROOM	Revved engine sound
VROOM	Sound of power
VROOM	Revving sound

VROOM	Sound heard at Indy
VROOM	Acceleration sound
VROOM	Sound of acceleration
VROOM	Raceway sound

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.