risk vs venture

risk and venture both are nouns.

Word	Noun	Adjective	Verb	Adverb
risk	Yes	No	Yes	No
venture	Yes	No	Yes	No

As nouns, venture is a hypernym of risk; that is, venture is a word with a broader meaning than risk:

risk: a venture undertaken without regard to possible loss or injury
venture: any venturesome undertaking especially one with an uncertain outcome

As verbs, venture is a hyponym of risk; that is, venture is a word with a more specific, narrower meaning than risk:

Other hyponyms of risk include adventure, hazard, jeopardize, stake, bell the cat.

risk (noun)	venture (noun)
a venture undertaken without regard to possible loss or injury	any venturesome undertaking especially one with an uncertain outcome
the probability of being exposed to an infectious agent	a commercial undertaking that risks a loss but promises a profit
the probability of becoming infected given that exposure to an infectious agent has occurred	an investment that is very risky but could yield great profits
a source of danger; a possibility of incurring loss or misfortune

risk (verb)	venture (verb)
expose to a chance of loss or damage	put forward, of a guess, in spite of possible refutation
take a risk in the hope of a favorable outcome	put at risk
	proceed somewhere despite the risk of possible dangers