Gypsum board is a considerably more specific, less generic, term than partition. My wooden house has some internal non-structural walls but none of them use gy

Gypsum board is a considerably more specific, less generic, term than partition. My wooden house has some internal non-structural walls but none of them use gypsum boards (called plasterboard in British English). Neither are they skimmed with plaster. They are instead faced with a very dense and flat hardboard.