plunger vs swimmer

plunger and swimmer both are nouns.

Word	Noun	Adjective	Verb	Adverb
plunger	Yes	No	No	No
swimmer	Yes	No	No	No

As nouns, swimmer is a hypernym of plunger; that is, swimmer is a word with a broader meaning than plunger:

plunger (noun)	swimmer (noun)
mechanical device that has a plunging or thrusting motion	a trained athlete who participates in swimming meets
hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains	a person who travels through the water by swimming
someone who risks losses for the possibility of considerable gains
someone who dives (into water)