noun (n)

• impairment of normal physiological function affecting part or all of an organism(noun.state)

  Synonym:
  illness, malady, unwellness
  Antonym:
  health, wellness
  

  source: wordnet30
• defectiveness or unsoundness(noun.state)

  Example:
  Drugs have become a sickness they cannot cure.
  A great sickness of his judgment.
  

  source: wordnet30
• the state that precedes vomiting(noun.state)

  Synonym:
  nausea
  

  source: wordnet30
• The quality or state of being sick or diseased; illness; sisease or malady.(noun)

  source: webster1913