noun (n)

• the contestant who wins the contest(noun.person)

  Synonym:
  victor
  Antonym:
  also-ran, loser
  

  source: wordnet30
• a gambler who wins a bet(noun.person)

  Antonym:
  loser
  

  source: wordnet30
• a person with a record of successes(noun.person)

  Example:
  Only winners need apply.
  

  Synonym:
  achiever, succeeder, success
  Antonym:
  failure, loser, nonstarter, unsuccessful person
  

  source: wordnet30
• One who wins, or gains by success in competition, contest, or gaming.(noun)

  source: webster1913