- diver, frogman, underwater diver - someone who works underwater
--1 is a kind of explorer, adventurer
--1 has particulars: deep-sea diver; pearl diver, pearler; scuba diverDerived form: verb dive3 - diver, plunger - someone who dives (into water)
--2 is a kind of swimmer
Derived form: verb dive2 - loon, diver - large somewhat primitive fish-eating diving bird of the northern hemisphere having webbed feet placed far back; related to the grebes
--3 is a kind of gaviiform seabird
--3 is a member of Gavia, genus Gavia