I generally build what I want before worrying about the nomenclature. What is a panel called when it uses both stiles and rails and the panel is flush to both faces of the stiles / rails (i.e. one thickness throughout panel)? I've certainly built one, but I'm not sure what it's called.
I Googled flush panel woodworking stiles and rails... nothing really comes up. It would have to be called something similar, I would think.
Exposed panel _ Unfinished_small.jpg