noun (n)

• someone who walks in a laborious heavy-footed manner(noun.person)

  Synonym:
  plodder, trudger
  

  source: wordnet30
• someone who works slowly and monotonously for long hours(noun.person)

  Synonym:
  plodder
  

  source: wordnet30
• a boxer noted for an ability to deliver hard punches(noun.person)

  Synonym:
  slugger
  

  source: wordnet30
• A hard hitter; a slugger.(noun)

  source: webster1913