As adjectives the difference between permissible and advisable
is that permissible
is permitted while advisable
is (of a course of action) worthy of being recommended; desirable.
(of a course of action) Worthy of being recommended; desirable.
* 1813 , , Pride and Prejudice , ch. 19,
(of a person) Capable of being advised or willing to be advised.
- Perhaps it will be advisable for me to state my reasons for marrying.
* (worthy of being recommended) prudent, wise
* (capable of being advised) counselable