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TUBE
Tube (noun) — conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases. 2. (noun) electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope.
Tube is a valid 4-letter word worth 6 points in Scrabble (and Words With Friends letter values vary). Below are its anagrams and the shorter words hidden inside it.