Crossword clues for Energy units: abbr. 4 letters:BTUSEnergy units: abbr.KCALFood energy unit: Abbr.BBLSEnergy-related units: Abbr.FTLBUnit of energy: Abbr.KWHEnergy unit: Abbr.BTUEnergy unit: Abbr.CALEnergy unit: abbr.EVSTiny units of energy: Abbr.KWHUnit of energy: Abbr.