13-Letter Words Containing: A,R,O,R

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

• accumulation of fluid in the pleural cavity (the space between the lungs and the walls of the chest) often resulting from disease of the heart or kidneys

• a group of viruses including those causing mumps and measles

• the process whereby hydrocarbon molecules of petroleum are broken down into kerosene and gasolene by the addition of hydrogen under high pressure in the presence of a catalyst

• present in an overly dramatic manner

• an antineoplastic drug used to treat Hodgkin's disease