bet
noun
the money risked on a gamble
the act of gambling
“he did it on a bet”
Synonymswager
verb
maintain with or as if with a bet
“I bet she will be there!”
Synonymswagerstake on the outcome of an issue
“I bet $100 on that new horse”
“She played all her money on the dark horse”
have faith or confidence in
“you can count on me to help you any time”
“Look to your friends for support”
Source: WordNet 3.1, Princeton University