mountaineer vs venturer

mountaineer and venturer both are nouns.

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

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

Other hypernyms of mountaineer include adventurer, climber.

mountaineer (noun)	venturer (noun)
someone who climbs mountains	a person who enjoys taking risks
	a merchant who undertakes a trading venture (especially a venture that sends goods overseas)

mountaineer (verb)	venturer (verb)
climb mountains for pleasure as a sport