venturer vs speculator

venturer and speculator both are nouns.

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

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

venturer: a person who enjoys taking risks
speculator: someone who risks losses for the possibility of considerable gains

venturer (noun)	speculator (noun)
a person who enjoys taking risks	someone who risks losses for the possibility of considerable gains
a merchant who undertakes a trading venture (especially a venture that sends goods overseas)	someone who makes conjectures without knowing the facts