watertight Antonyms

unseaworthy questionable porous permeable obscure leaky leaking invented invalid inexact indefinite incomplete sham spurious imprecise phoney violable vague untrue unsound unreliable unfounded uncertain theoretical theoretic hypothetical flawed approximate apocryphal answerable anomalous ambiguous affected adopted academical academic absorbent abnormal arguable artificial fictitious false fake fabricated counterfeit contestable concocted bogus atypical assuming