exciting
latest, new
profitable, successful
costly, expensive, unprofitable
failed, ill-fated, unsuccessful
ambitious, bold, high-risk, risky, speculative
collaborative, cooperative, joint
a joint-venture company

private, solo
entrepreneurial, start-up
business, commercial, corporate, financial, moneymaking
Internet, publishing

embark on, undertake
The directors of the company refused to undertake such a risky venture.

establish, launch, set up, start
The company has set up a joint venture with a company in Austria.

finance, fund
join, join in, join sb in
His son Mark will be joining him in the new venture.

capital, funding, funds, money
capitalist

venture by
a cooperative venture by companies at the science park

cautiously
She ventured cautiously into the room.

never, occasionally, rarely, seldom
They never ventured from their buildings after sunset.

far, further/farther, further/farther afield
Some of the men ventured farther out to sea.

close, deep
He ventured deeper into the forest.

abroad (esp. BrE), back, down, forth, inside, off, out, outside
We ventured down to the south coast over the weekend.
A few people ventured out into the street.

dare (to)
She would not have dared venture here alone.

decide to

away from, beyond, down, into, out of, to
They rarely ventured beyond their local town.

Venture is used with these nouns as the object:
guess, opinion