arcate: bow-shaped
archimandrite: head of a monastery or convent
arctoid: bear-like
arefy: to dry up; to wither
aret: to assign or allot
argil: clay used in making pottery
argute: shrill; keen; shrewd
aristarchy: government by the best
armigerous: entitled to bear arms
arpent: unit of land area slightly smaller than an acre
arrendator: one who rents or farms at a yearly rent
arthrology: study of joints