pounder

Short definition from Wiktionary

Noun

1. 1
   A vessel in which something is pounded, or an implement used in pounding.
2. 2
   A gun capable of firing a specified weight of shot in pounds.
3. 3
   Something that weighs a specified number of pounds.
4. 4
   Something or someone costing so many pounds sterling.

Proper noun

1. 1
   A surname.