| noun | a future prospect or potential “this room has great possibilities” |
| noun | capability of existing or happening or being true “there is a possibility that his sense of smell has been impaired” |
| noun | 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” |
| noun | a possible alternative “bankruptcy is always a possibility” |
| possible | adjective | existing in possibility |
| hypothecate | verb | to believe especially on uncertain or tentative grounds |
| hypothesize | verb | to believe especially on uncertain or tentative grounds |
| theorist | noun | someone who theorizes (especially in science or art) |
| theoretic | adjective | concerned primarily with theories or hypotheses rather than practical considerations |
| theoretician | noun | someone who theorizes (especially in science or art) |
| theorize | verb | to believe especially on uncertain or tentative grounds |
| theorise | verb | to believe especially on uncertain or tentative grounds |