verb (v)

• find fault with; express criticism of; point out real or perceived flaws(verb.communication)

  Example:
  The paper criticized the new movie.
  

  Synonym:
  criticise, knock, pick apart
  Antonym:
  praise
  

  source: wordnet30
• act as a critic(verb.competition)

  Example:
  Those who criticize others often are not perfect, either.
  

  Synonym:
  criticise
  

  source: wordnet30