Meaning : Deliver a sharp blow or push.

Example : He knocked the glass clear across the room.

Synonyms : strike hard

Meaning : Rap with the knuckles.

Example : Knock on the door.

Meaning : Knock against with force or violence.

Example : My car bumped into the tree.

Synonyms : bump

Meaning : Make light, repeated taps on a surface.

Example : He was tapping his fingers on the table impatiently.

Synonyms : pink, rap, tap

Meaning : Sound like a car engine that is firing too early.

Example : The car pinged when I put in low-octane gasoline.
The car pinked when the ignition was too far retarded.

Synonyms : ping, pink

Meaning : Find fault with. Express criticism of. Point out real or perceived flaws.

Example : The paper criticized the new movie.
Don't knock the food--it's free.

Synonyms : criticise, criticize, pick apart

Meaning : The sound of knocking (as on a door or in an engine or bearing).

Example : The knocking grew louder.

Synonyms : knocking

Meaning : Negative criticism.

Synonyms : roast

Meaning : A vigorous blow.

Example : The sudden knock floored him.
He took a bash right in his face.
He got a bang on the head.

Synonyms : bang, bash, belt, smash

Meaning : A bad experience.

Example : The school of hard knocks.

Meaning : The act of hitting vigorously.

Example : He gave the table a whack.

Synonyms : belt, rap, whack, whang