Unclimbable
Part of speech: adjective
Definition: Not able to be climbed
Unpassable
Part of speech: adjective
Definition: Not able to be passed.
Unclimbable as an adjective is not able to be climbed while Unpassable as an adjective is not able to be passed.
Part of speech: adjective
Definition: Not able to be climbed
Part of speech: adjective
Definition: Not able to be passed.
We hope you now know whether to use Unclimbable or Unpassable in your sentence.