diver vs frogman

diver and frogman both are nouns.

Word	Noun	Adjective	Verb	Adverb
diver	Yes	No	No	No
frogman	Yes	No	No	No

As nouns, diver and frogman are synonyms defined as:

Other synonyms of diver include underwater diver.

diver (noun)	frogman (noun)
large somewhat primitive fish-eating diving bird of the Northern Hemisphere having webbed feet placed far back; related to the grebes	someone who works underwater
someone who dives (into water)
someone who works underwater