Synonyms of PLUNGER

noun

1. someone who risks losses for the possibility of considerable gains

   • SPECULATOR14

2. someone who dives (into water)

   • DIVER9

3. hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains

   Also: plumber's helper.

4. mechanical device that has a plunging or thrusting motion

   • PISTON8