venturer vs mountaineer

venturer and mountaineer both are nouns.

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

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

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

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