Wham
Part of speech: noun
Definition: a forceful blow the sound of such a blow; a thud
Part of speech: verb
Definition: to strike or smash (into) something with great force or impact
Whack
Part of speech: noun
Definition: A blow, impact or slap.A share or portion.An attempt.
Part of speech: verb
Definition: To hit, slap or strike.To kill, bump off.To share or parcel out.
Example sentence: When a poll is really, really out of whack with what I want to happen, I do have a tendency to disregard it.