whack: The judge's gavel came down with a heavy whack silencing the noisy court room.
wham: "Wham, wham" pounded the pole driver into the ground.
whir: The whir of the propellers got louder and louder before the plane took off from the runway.
whizz: The motor whizzed as it went faster and faster.
whoop: "Whoop, whoop, whoop" the ceiling fan sounded in the heat of the night.
whoosh: With a loud whoosh, the new high speed elevator cut through the air contained in the shaft.
woof: The deep woof of the large dog made them happy that they were on the other side of the tall fence.