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ER
Er (noun) — a trivalent metallic element of the rare earth group; occurs with yttrium. 2. (noun) a room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment.
Er is a valid 2-letter word worth 2 points in Scrabble (and Words With Friends letter values vary). Below are its anagrams and the shorter words hidden inside it.