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