noun (n)

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

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

  source: wordnet30
• One whose occupation is to load and unload vessels in port; one who stows a cargo in a hold.(noun)

  source: webster1913