valid Antonyms

invalid voided undulant unconstitutional unconceivable unbacked unapproved unacceptable truthless triable tortility tortile tidal theoretical theoretic suppositive suppositional unequitable unfounded void vermiform vermiculate vermicular valetudinary up unwarranted untruthful untrue unsound unsensible unreliable unreasonable unreal unlikely unlawful superstitious stowaway reasonless putative prosecutable prohibited preposterous piratical pinchbeck picaresque philosophistic personate pathological pathologic parrot