The word incrustations 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: 19
Highest Scoring Words With Friends™ Play In The Letters incrustations
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Seven Letter Word Alert: (87 words)
actions, anionic, anoints, artists, atonics, auction, autists, caisson, cantons, cantors, cartons, casinos, castors, cations, caution, citator, citrons, consist, contain, costars, cousins, cratons, cuatros, curtain, iconist, incants, incisor, incrust, instant, instars, intorts, introns, intrust, intuits, inturns, nations, niacins, nicosia, nitrous, nonarts, nonsuit, notists, octants, outcast, outrant, outsits, racists, rainout, raisins, rations, rattons, ricotta, rustics, sanctus, satiric, scorias, stannic, statics, statins, station, strains, straint, straits, stratus, suction, suitors, sunstar, suntans, sustain, tantric, taoists, titanic, tocsins, toucans, tourist, transit, tricots, truants, tsarist, tuition, uncarts, uncross, unction, unicorn, unsorts, unstain, unstoic