The word bicentenaries 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: 21
Highest Scoring Words With Friends™ Plays In The Letters bicentenaries
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Seven Letter Word Alert: (98 words)
absence, aeriest, airiest, ancient, antsier, arcsine, arenite, arsenic, ascribe, asinine, baiters, banners, banters, barites, beanies, beaters, berates, biennia, bitsier, cabinet, canines, cannier, canteen, canters, carbeen, carbene, carbine, careens, carnies, catenin, centers, centres, cerates, certain, cistern, citrine, creates, cretins, cristae, earnest, eastern, eeriest, ensnare, enteric, enticer, entices, entrain, entrees, entries, incants, incense, inciter, incites, inertia, insaner, intense, interns, irenics, irisate, nascent, nastier, nearest, neatens, nectars, niacins, nitrene, raciest, rebaits, rebates, rebites, recanes, recants, recites, reenact, rennets, restain, retains, retinas, satiric, scanner, scanter, scenter, secrete, seriate, sericin, sincere, stainer, stannic, sterane, tanners, teenier, tenners, tinners, tinnier, trainee, trances, triaene, trienes