Presidential :: Presidential (a.) Of or pertaining to a president; as, the presidential chair; a presidential election..
Residential :: Residential (a.) Of or pertaining to a residence or residents; as, residential trade..
Residentiary :: Residentiary (a.) Having residence; as, a canon residentary; a residentiary guardian..
Residentiary :: Residentiary (n.) An ecclesiastic who keeps a certain residence.