Unimpeachable
Part of speech: adjective
Definition: not able to be impeached or reproached blameless beyond doubt
Unquestionable
Part of speech: adjective
Definition: undeniable, obvious
Unimpeachable as an adjective is not able to be impeached or reproached while Unquestionable as an adjective is undeniable, obvious
Part of speech: adjective
Definition: not able to be impeached or reproached blameless beyond doubt
Part of speech: adjective
Definition: undeniable, obvious
We hope you now know whether to use Unimpeachable or Unquestionable in your sentence.