WordNet sense 1 (a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere):

argon

WordNet sense 2 (a unit of surface area equal to 100 square meters):

are, are

WordNet sense 3 (a state in south central United States; one of the Confederate states during the American Civil War):

Arkansas, Land of Opportunity