All believable antonyms

adj believable

• implausible — not plausible; not having the appearance of truth or credibility: an implausible alibi.
• improbable — not probable; unlikely to be true or to happen: Rain is improbable tonight.
• inconceivable — not conceivable; unimaginable; unthinkable.
• unbelievable — too dubious or improbable to be believed: an unbelievable excuse.
• unimaginable — capable of being imagined or conceived.
• unlikely — not likely to be or occur; improbable; marked by doubt.
• unconvincing — persuading or assuring by argument or evidence: They gave a convincing demonstration of the car's safety features.
• unreliable — not reliable; not to be relied or depended on.
• unthinkable — inconceivable; unimaginable: the unthinkable size of the universe.
• incredible — so extraordinary as to seem impossible: incredible speed.
• unreasonable — not reasonable or rational; acting at variance with or contrary to reason; not guided by reason or sound judgment; irrational: an unreasonable person.