The word chalcocites is playable in Words With Friends™, but 1 blank substituting for the letter 'c' is required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 19
Highest Scoring Words With Friends™ Play In The Letters chalcocites
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Seven Letter Word Alert: (45 words)
accites, achiest, aitches, alecost, alethic, aloetic, ascetic, cachets, cacolet, calcite, caliche, calicos, caltech, castile, catches, celosia, chalets, chalice, chaotic, choices, cholate, choleic, clastic, cliches, cloches, clothes, coaches, coalise, coalite, cochlea, coeliac, coltish, elastic, ethical, halites, holiest, hostile, isolate, laciest, lactose, latches, loathes, locates, satchel, stoical