Noah Webster
Keystone
KE'YSTONE, noun The stone on the top or middle of an arch or vault, which being wider at the top than at the bottom, enters like a wedge and binds the work; properly, the fastening-stone.
KHAN, noun kaun. In Asia, a governor; a king; a prince; a chief. In Persia, the word denotes the governor of a province; among the Tartars, it is equivalent to king or prince.
1. An inn.