argonaut vs venturer

argonaut and venturer both are nouns.

Word	Noun	Adjective	Verb	Adverb
argonaut	Yes	No	No	No
venturer	Yes	No	No	No

As nouns, venturer is a hypernym of argonaut; that is, venturer is a word with a broader meaning than argonaut:

argonaut: someone engaged in a dangerous but potentially rewarding adventure
venturer: a person who enjoys taking risks

Other hypernyms of argonaut include adventurer.

argonaut (noun)	venturer (noun)
someone engaged in a dangerous but potentially rewarding adventure	a person who enjoys taking risks
	a merchant who undertakes a trading venture (especially a venture that sends goods overseas)