Advisability :: Advisability (n.) The quality of being advisable; advisableness.
Advisable :: Advisable (a.) Proper to be advised or to be done; expedient; prudent.
Advisable-ness :: Advisable-ness (n.) The quality of being advisable or expedient; expediency; advisability.
Unadvisable :: Unadvisable (a.) Not advisable; inadvisable; inexpedient.