15-Letter Words Containing: E,A,P,E,R,C,H

• antibacterial substance that is a water-soluble powder used in antiseptic soaps and toothpaste

• The fused head and thorax of spiders and crustaceans

• the quality of being brachycephalic

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

• roentgenography of the brain after spinal fluid has been replaced by a gas (usually oxygen); produces an encephalogram

• the branch of psychiatry concerned with psychological methods

• the treatment of mental or emotional problems by psychological means

• the posterior portion of the brain including cerebellum and brainstem