Plunger
Part of speech: noun
Definition: A device that is used to remove blockages from a toilet or sink by suction. The internal piece of a syringe that pushes out or pulls in any contents. The remote sliding activator of an explosive device. The part of a cafetière that is pushed down to remove grounds from coffee. One who plunges.
Diver
Part of speech: noun
Definition: someone who dives, especially as a sportsomeone who works underwater; a frogmanthe loon (bird)The New Zealand sand diverThe Long-finned sand diver
Example sentence: I'm friends with James Cameron. We've spent time together over the years because he is a diver and explorer and in his heart of hearts a biologist. We run into each other at scientific conferences.