is a specific kind of: quality.

is a broader term that covers: doubt, doubtfulness, dubiousness, question | indefiniteness, indefinity, indeterminacy, indeterminateness, indetermination | unpredictability | improbability, improbableness | fortuitousness | speculativeness.

is the opposite of: certainty, foregone conclusion, sure thing.

derivation: uncertain | incertain, uncertain, unsure | uncertain | uncertain | precarious, unstable | uncertain, unsealed | precarious, shaky.