possibility

a future prospect or potential; "this room has great possibilities"

capability of existing or happening or being true; "there is a possibility that his sense of smell has been impaired"

a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena; "a scientific hypothesis that survives experimental testing becomes a scientific theory"; "he proposed a fresh theory of alkalis that later was accepted in chemical practices"

a possible alternative; "bankruptcy is always a possibility"