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BULB
Bulb (noun) — a modified bud consisting of a thickened globular underground stem serving as a reproductive structure. 2. (noun) electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity.
Bulb is a valid 4-letter word worth 8 points in Scrabble (and Words With Friends letter values vary). Below are its anagrams and the shorter words hidden inside it.