The word ostracised 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: 14
Highest Scoring Words With Friends™ Play In The Letters ostracised
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Seven Letter Word Alert: (55 words)
actress, aridest, ascites, astride, astroid, carotid, casters, castors, ceroids, coasted, coaster, coedits, cordate, corsets, cosiest, costars, credits, cristae, crossed, dacites, directs, discase, disrate, dissect, dossier, drastic, editors, erotica, erotics, escorts, oecists, raciest, racists, radices, recasts, recoats, redacts, roadies, roasted, roisted, rosiest, sarcode, satires, scoriae, scorias, sectors, sidecar, sortied, sorties, steroid, storied, stories, strides, tierods, tirades