adventurer vs gambler

adventurer and gambler both are nouns.

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

As nouns, gambler is a hyponym of adventurer; that is, gambler is a word with a more specific, narrower meaning than adventurer:

adventurer (noun)	gambler (noun)
a person who enjoys taking risks	a person who wagers money on the outcome of games or sporting events
someone who travels into little known regions (especially for some scientific purpose)	someone who risks loss or injury in the hope of gain or excitement