All credible antonyms

adj credible

• undependable — capable of being depended on; worthy of trust; reliable: a dependable employee.
• unreliable — not reliable; not to be relied or depended on.
• untrustworthy — deserving of trust or confidence; dependable; reliable: The treasurer was not entirely trustworthy.
• unacceptable — capable or worthy of being accepted.
• implausible — not plausible; not having the appearance of truth or credibility: an implausible alibi.
• deceptive — If something is deceptive, it encourages you to believe something which is not true.
• irresponsible — said, done, or characterized by a lack of a sense of responsibility: His refusal to work shows him to be completely irresponsible.
• dishonest — not honest; disposed to lie, cheat, or steal; not worthy of trust or belief: a dishonest person.
• unbelievable — too dubious or improbable to be believed: an unbelievable excuse.
• unsound — not sound; unhealthy, diseased, or disordered, as the body or mind.
• improbable — not probable; unlikely to be true or to happen: Rain is improbable tonight.
• inconceivable — not conceivable; unimaginable; unthinkable.
• unimaginable — capable of being imagined or conceived.
• unlikely — not likely to be or occur; improbable; marked by doubt.
• untenable — incapable of being defended, as an argument, thesis, etc.; indefensible.
• unreasonable — not reasonable or rational; acting at variance with or contrary to reason; not guided by reason or sound judgment; irrational: an unreasonable person.
• impossible — not possible; unable to be, exist, happen, etc.
• incredible — so extraordinary as to seem impossible: incredible speed.