reliever

reliever
    n 1: someone who takes the place of another (as when things get
         dangerous or difficult); "the star had a stand-in for
         dangerous scenes"; "we need extra employees for summer
         fill-ins" [syn: {stand-in}, {substitute}, {relief},
         {reliever}, {backup}, {backup man}, {fill-in}]
    2: a person who reduces the intensity (e.g., of fears) and calms
       and pacifies; "a reliever of anxiety"; "an allayer of fears"
       [syn: {reliever}, {allayer}, {comforter}]
    3: a pitcher who does not start the game [syn: {reliever},
       {relief pitcher}, {fireman}]
    

Reliever \Re*liev"er\ (-?r), n.
   One who, or that which, relieves.
   [1913 Webster]