WordNet: doorknocker, knocker, rapper

a device (usually metal and ornamental) attached by a hinge to a door

• hypernym device

• part holonym front door, front entrance

doorknocker

• (suomi) kolkutin (synonyymi)

knocker

• (suomi) kolkutin (synonyymi)

rapper

• (suomi) kolkutin (synonyymi)