The word chalcanthites is playable in Words With Friends™, no blanks 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: 25
Highest Scoring Words With Friends™ Play In The Letters chalcanthites
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Seven Letter Word Alert: (73 words)
accents, accites, achiest, actants, aitches, alethic, alicant, ascetic, atheist, attache, attains, cachets, calcine, calcite, caliche, caltech, cancels, cantles, castile, catches, cattail, chalets, chalice, chancel, chances, chasten, chattel, cinches, clastic, cliches, clients, elastic, elastin, entails, etchant, ethical, ethnics, halites, hastate, hatches, hatchet, healths, hitches, inhales, instate, laciest, lactase, lactate, lancets, latches, latents, latites, lattice, lichens, nailset, nictate, saccate, salient, saltate, saltcat, satanic, satchel, satiate, sealant, statice, stealth, stencil, tactics, tactile, talents, tetanic, thistle, tictacs