noun (n)

• the quality of being suitable(noun.attribute)

  Example:
  They had to prove their fitness for the position.
  

  Synonym:
  fittingness
  Antonym:
  unfitness
  

  source: wordnet30
• good physical condition; being in shape or in condition(noun.state)

  Synonym:
  physical fitness
  Antonym:
  softness, unfitness
  

  source: wordnet30
• fitness to traverse the seas(noun.state)

  Synonym:
  seaworthiness
  

  source: wordnet30
• the quality of being qualified(noun.attribute)

  source: wordnet30
• The state or quality of being fit; as, the fitness of measures or laws; a person's fitness for office.(noun)

  source: webster1913