noun (n)

• a laborer who loads and unloads vessels in a port(noun.person)

  Synonym:
  dock worker, dock-walloper, docker, dockhand, dockworker, longshoreman, lumper, stevedore
  

  source: wordnet30
• an attendant who loads guns for someone shooting game(noun.person)

  source: wordnet30
• One who, or that which, loads; a mechanical contrivance for loading, as a gun.(noun)

  source: webster1913