ARM - The portion of the upper human appendage, from the shoulder to the wrist and sometimes including the hand.
MAR - To spoil, to damage.
MAY - The hawthorn bush or its blossoms.
OAR - An implement used to propel a boat or a ship in the water, having a flat blade at one end, being rowed from the other end and being normally fastened to the vessel.
RAM - A male sheep.
RAY - A beam of light or radiation.
YAM - Any climbing vine of the genus Dioscorea in the Eastern and Western hemispheres, usually cultivated.
ARMY - A large, highly organized military force, concerned mainly with ground (rather than air or naval) operations.
ROAM - To wander or travel freely and with no specific destination.
ROAR - To make a loud, deep cry, especially from pain, anger, or other strong emotion.
ARMOR - A protective layer over a body, vehicle, or other object intended to deflect or diffuse damaging forces.
MARRY - Indeed!, in truth!; a term of asseveration.
MAYOR - The leader of a city, or a municipality, sometimes just a figurehead and sometimes a powerful position. In some countries, the mayor is elected by the citizens or by the city council.
MORAY - Any of the large cosmopolitan carnivorous eels of the family Muraenidae.
ARMORY - US spelling of armoury.