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ACID
Acid (noun) — any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt. 2. (noun) street name for lysergic acid diethylamide.
Acid is a valid 4-letter word worth 7 points in Scrabble (and Words With Friends letter values vary). Below are its anagrams and the shorter words hidden inside it.