Antichlor :: Antichlor (n.) Any substance (but especially sodium hyposulphite) used in removing the excess of chlorine left in paper pulp or stuffs after bleaching.
Antichrist :: Antichrist (n.) A denier or opponent of Christ. Specif.: A great antagonist, person or power, expected to precede Christ's second coming..
Antichristian :: Antichristian (a.) Opposed to the Christian religion.