swashbuckler vs adventurer

swashbuckler and adventurer both are nouns.

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

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

Other hypernyms of swashbuckler include venturer.

swashbuckler (noun)	adventurer (noun)
a reckless impetuous irresponsible person	a person who enjoys taking risks
	someone who travels into little known regions (especially for some scientific purpose)