hammer at something
pound at something

Some one was pounding at the door of the suite.

His heart was pounding at the thought of what lay ahead.

Who pounded at someone's door this early in the morning anyway?

Men were pounding at the door of the living room.

A good many men were pounding past at a dead run.

I had not expected them to pound away at our rear wall like this.

My heart is pounding at the thought of seeing him again.

I must talk quickly, for they are pounding at my door.

For the next couple of hours, he pounded away at it.

Someone was pounding at the front door of the garage.