WARDEN is validvalid

the chief officer of a prison [n WARDENS] : WARDENRY [n], WARDENSHIP [n]

30,992 of 196,601 in NWL2023·also valid in CSW24

someone who guards or keeps under supervision people, animals, buildings, precious objects, etc. [n -S] / to guard as a warden [v -ED, -ING, -S]