uncorroborated Synonyms

unsubstantiated without substantiation unsupported unconfirmed unverified ungrounded unwarranted untrue unsound unreasonable unjustified ill-founded without cause unendorsed unauthenticated unattested unproven unjustifiable untenable unofficial unfounded speculative specious false fabricated erroneous empty dubious doubtful conjectural bottomless flimsy foundationless gratuitous invalid insupportable inofficial indefensible implausible illogical idle groundless baseless