9 letters · 11 points in Scrabble
originFrom Middle English castelain, from Old French castelain (compare modern châtelain), from Latin castellanus (“pertaining to a castle, an occupant of a castle, or a governor of a castle”), from castellum castle, citadel, diminutive of castrum fortified place. See castle. By surface analysis, Old French castel + -an and castle + -an. Doublet of Castilian, castellano, castellanus, and chatelain…
Etymology from Wiktionary, CC BY-SA 3.0