A hammer with two prongs protruding back from the head to allow for removing nails from wood.

a hammer used by a blacksmith

(idiomatic) To repeatedly or continually emphasise (an opinion or idea) until or so that a person or group of people understands it.

An industrial machine designed to produce a hammer action through steam power.

plural of steam hammer

(uncountable) A surge of pressure in a pipe carrying a fluid; especially the banging sound in a steam or hot water pipe caused by bubbles of air, or by an abrupt alteration of the flow.

(transitive) To come to (a difficult agreement or settlement) after much arguing and conflict.

plural of hammer-on

A medieval hammer-like weapon used in close combat.

An athletic throwing event where the object to be thrown is a heavy steel ball attached with wire (maximum length 4 ft (1.22 m)) to a handle.