invalid Synonyms

illegitimate infirm disabled disallowed unwell erroneous unsound untrue fallacious faulty void flawed incorrect wrong incapacitate handicap handicapped inoperative unfounded null sick ailing nullified disable spurious voidable seasick valetudinarian rejected reasonless weak valueless dysfunctional voided valetudinary unacceptable sufferer unlawful specious sophistical unreasoned sophistic sickly sickish sicker unreasonable self-contradictory useless unsuitable untenable