WordRel.com

• action intended to nullify the effects of some previous action

  synonym	counteractionneutralization
  derivation	neutralise
  exemplifies	Australian spellingBritish spelling
  hypernym	nullificationoverride

• action intended to keep a country politically neutral or exclude it from a possible war

  synonym	neutralization
  derivation	neutralise
  exemplifies	Australian spellingBritish spelling
  hypernym	nullificationoverride

• (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation)

  synonym	neutralization
  exemplifies	Australian spellingBritish spelling
  exemplifies	euphemism
  hypernym	destructiondevastation

• a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water

  synonym	neutralisation reactionneutralizationneutralization reaction
  derivation	neutralise
  exemplifies	Australian spellingBritish spelling
  hypernym	chemical reactionreaction