reliever

Meanings

• someone who takes the place of another (as when things get dangerous or difficult)
• a person who reduces the intensity (e.g., of fears) and calms and pacifies
  • "a reliever of anxiety"
• a pitcher who does not start the game

Synonyms

allayer, backup, backup man, comforter, fill-in, fireman, relief, relief pitcher, stand-in, substitute