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 There are 4 thirteen-letter words containing 2E, 2H, M, O and U| HEXAMETHONIUM | • hexamethonium n. (Pharmacology) Synonym of hexamethonium bromide. • HEXAMETHONIUM n. either of two compounds used as ganglionic blocking agents in the treatment of hypertension. |  | HOMEOTHERMOUS | • HOMEOTHERMOUS adj. keeping the same temperature, warm-blooded. |  | LIGHTHOUSEMEN | • lighthousemen n. Plural of lighthouseman. • LIGHTHOUSEMAN n. one who keeps a lighthouse. |  | MOUTHBREATHER | • mouthbreather n. Alternative spelling of mouth breather. • mouth-breather n. Alternative spelling of mouth breather. • mouth␣breather n. A person who routinely inhales and exhales through the mouth, instead of through the nose. |  
 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America. Definitions are short excerpt from the WikWik.org and 1Word.ws. 
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