She had a pair of nigger knockers hanging on her front door.

I love the unique designs of door knockers on old houses.

The knockers up were responsible for waking people up in the morning.

The wrestling match was full of slobber knockers.

The tin knockers are working on the roof of the building.

The pork knockers are searching for gold in the river.

The pork-knockers are searching for gold in the river.

The wrestling match was full of slobber-knockers.

The apple-knockers were busy harvesting the apples from the orchard.

The Newgate knockers were used to alert the guards of any incoming visitors.