English to English

noun (n)

• the psychological state of being irritated or annoyed(noun.state)

  Synonym:
  botheration, irritation, vexation
  

  source: wordnet30
• anger produced by some annoying irritation(noun.feeling)

  Synonym:
  chafe, vexation
  

  source: wordnet30
• an unpleasant person who is annoying or exasperating(noun.person)

  Synonym:
  aggravator
  

  source: wordnet30
• something or someone that causes trouble; a source of unhappiness(noun.cognition)

  Synonym:
  bother, botheration, infliction, pain, pain in the ass, pain in the neck
  

  source: wordnet30
• the act of troubling or annoying someone(noun.act)

  Synonym:
  annoying, irritation, vexation
  

  source: wordnet30
• The act of annoying, or the state of being annoyed; molestation; vexation; annoy.(noun)

  source: webster1913