unsupported Synonyms

without substantiation untenable ill-founded unjustified unvalidated nonsupported unconfirmed unverified ungrounded misguided unassisted weak unwarranted unjustifiable unproven without merit without cause unsubstantiated unmeritorious unendorsed uncorroborated unclipped uncertified unbraced unauthenticated unattested unaided unwarrantable unsound idle groundless foundationless flimsy false fallacious empty dubious doubtful bottomless baseless baroscopic illogical insupportable unseconded unreliable unreasoned unreasonable unfounded speculative specious