1. (noun) speculator, plunger
someone who risks losses for the possibility of considerable gains
Synonyms: plunger, speculator, piston, diver, plumber's helper
2. (noun) diver, plunger
someone who dives (into water)
Synonyms: diver, plunger, piston, underwater diver, frogman, loon, speculator, plumber's helper
3. (noun) plunger, plumber's helper
hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains
Synonyms: diver, speculator, plunger, piston, plumber's helper
4. (noun) piston, plunger
mechanical device that has a plunging or thrusting motion
Synonyms: plunger, speculator, piston, diver, plumber's helper
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Synonyms and Antonyms of plunger 
