Antonyms for Supposable

Antonyms starting with letter I

• implausible

  believable, probable, trustworthy
• improbable

  believable, trustworthy, reasonable
• inconceivable

  believable, trustworthy, reasonable
• incredible

  reasonable, believable, trustworthy
• impossible

  reasonable, probable, believable
• irresponsible
• irrational

  reasonable
• incomprehensible
• inapt

  probable