reliever

noun4

1. •
   Something which relieves (pain, etc.).

   • Pepto-Bismol is an upset-stomach reliever.
2. •
   A relief pitcher.

   • The first reliever got the last two outs of the sixth.
3. •
   Someone who fills in for another.

   • I'll be the reliever today so that you can each take a break.
4. •
   (slang, old-fashioned) A garment kept for being lent out.

   • Now that fellow wants five or ten dollars on his suit. He goes to this pawn shop and asks for a reliever. That is a second-hand suit, pretty well used up. — 1929