frogman vs adventurer

frogman and adventurer both are nouns.

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

As nouns, adventurer is a hypernym of frogman; that is, adventurer is a word with a broader meaning than frogman:

frogman: someone who works underwater
adventurer: someone who travels into little known regions (especially for some scientific purpose)

Other hypernyms of frogman include explorer.

frogman (noun)	adventurer (noun)
someone who works underwater	a person who enjoys taking risks
	someone who travels into little known regions (especially for some scientific purpose)