an agreement to risk money etc on an event of which the result is doubtful
game of chance; money gambled
(to make) a conclusion, opinion, based on incomplete evidence
speculation, assumption
(an attempt or activity with) a risk of loss or a chance of profit; to play games to try to win money
chance, speculation
to form an opinion, give an answer, make a statement about (something) that is not based on very careful thought, calculation or definite knowledge
belief, speculation
an idea, suggestion, put forward as a starting-point for reasoning or an explanation
theory
something which seems likely although there is no proof; arrogance (the usual word)
belief, hypothesis
(an instance of) a possibility or chance (of meeting danger, suffering loss, injury etc)
chance taken
(an instance of) speculating; (a business deal as a result of) speculating
theory, guess
the act of supposing something to be true but without proof; a guess
guess, belief