possibility

(n) a future prospect or potential
- this room has great possibilities
(n) capability of existing or happening or being true
- there is a possibility that his sense of smell has been impaired
possibleness,
(n) 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
hypothesis, theory,
(n) a possible alternative
- bankruptcy is always a possibility
possible action, opening,

possibleness hypothesis theory possible action opening

impossibility impossibleness