plunger
(noun)
noun
1. someone who risks losses for the possibility of considerable gains
Similar word(s): speculator
Definition categories: person, adventurer, venturer, gambler
2. someone who dives (into water)
Similar word(s): diver
Definition categories: person, swimmer
3. hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains
Definition categories: man–made
4. mechanical device that has a plunging or thrusting motion
Similar word(s): piston
Definition categories: man–made