Unachievable
Part of speech: adjective
Definition: That cannot be achieved (or only with great difficulty)
Unrealizable
Part of speech: adjective
Definition: Not realizable; unable to be achieved or realized.
Difference between Unachievable and Unrealizable
What is the difference between Unachievable and Unrealizable?
Unachievable as an adjective is that cannot be achieved (or only with great difficulty) while Unrealizable as an adjective is not realizable; unable to be achieved or realized.
We hope you now know whether to use Unachievable or Unrealizable in your sentence.