gamble

nouns

money that is risked for possible monetary gain
is a type of (narrower)
an investment that is very risky but could yield great profits
"he knew the stock was a speculation when he bought it"
a risky act or venture
is a type of (narrower)
a venture undertaken without regard to possible loss or injury
"he saw the rewards but not the risks of crime"; "there was a danger he would do the wrong thing"

verbs

take a risk in the hope of a favorable outcome
"When you buy these stocks you are gambling"
is derived from
play games for money
is derived from
is derived from
is a type of (narrower)
participate in games or sport
"We played hockey all afternoon"; "play cards"; "Pele played for the Brazilian teams in many important matches"