CALXES
Scrabble letter values: C3A1L1X8E1S1 = 15
Definition
CALXES is the plural of CALX.
noun CALX: a white crystalline oxide used in the production of calcium hydroxide.
Synonyms of CALX: calcium_oxide, quicklime, lime, calcined_lime, fluxing_lime, unslaked_lime, burnt_lime