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WORDNET DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Adjective unprovable has 1 sense

• unprovable(s = adj.all) Array - not provable; "it was both unproved and unprovable"

OXFORD DICTIONARY

THESAURUS

unprovable

agnostic, ambiguous, capricious, chancy, changeable, controvertible, dicey, doubting, equivocal, erratic, fickle, hesitant, hesitating, incalculable, indecisive, indemonstrable, irresolute, polysemous, skeptical, touch-and-go, unaccountable, unattestable, uncertain, unconfirmable, unconvinced, undemonstrable, undemonstratable, undivinable, unforeseeable, unpersuaded, unpredictable, unsubstantiatable, unsupportable, unsure, unsustainable, unverifiable, variable, wavering, whimsical

For further exploring for "unprovable" in Webster Dictionary Online