Synonyms for Venture (same or very similar meaning)
WordNet sense 1 (an investment that is very risky but could yield great profits):
speculation
WordNet sense 2 (put at risk):
adventure, hazard, jeopardize, stake
WordNet sense 3 (proceed somewhere despite the risk of possible dangers):
embark
WordNet sense 4 (put forward, of a guess, in spite of possible refutation):
guess, pretend
From the ODE community, based on WordNet
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