The word exhibitioners 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: 26
Highest Scoring Words With Friends™ Play In The Letters exhibitioners
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Seven Letter Word Alert: (55 words)
beerish, benthos, biotins, bitsier, boneset, boniest, boreens, bothers, boxiest, boxtree, ebonies, enrobes, entries, erotise, estrone, exhibit, exhorts, herbist, herbose, heroine, heroins, heroise, heteros, hexones, histone, hornets, inboxes, inherit, inhibit, inosite, inshore, ioniser, ironies, neither, niobite, noisier, norites, orients, oxbiter, rebites, reboxes, rehones, reshine, sherbet, shinier, shorten, sixteen, sorbite, stonier, therein, thereon, thiones, thrones, trienes, triones