The word corticosteroids 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: 22
Highest Scoring Words With Friends™ Play In The Letters corticosteroids
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Seven Letter Word Alert: (94 words)
ceroids, ciscoes, codices, coedits, cooties, correct, corrode, corsets, cosiest, cotters, credits, cricoid, critics, critter, crosier, crossed, crosser, decocts, deictic, deistic, detorts, diciest, dietics, dietist, dioecic, diorite, directs, dirtier, dirties, disroot, dissect, distort, ditsier, ditties, dittoes, doctors, dossier, dotiest, dotters, dottier, editors, erotics, escorts, icteric, iodiser, iodises, iodites, oecists, osteoid, records, recross, rectors, redroot, reroots, resorts, restirs, retorts, rioters, risotto, roisted, roister, roosted, rooster, rooters, rosiest, rosters, rotters, scooted, scooter, scorers, sectors, sitters, soccers, sootier, soricid, sorters, sortied, sorties, steroid, stirred, storied, stories, strider, strides, stridor, tictocs, tidiers, tidiest, tierods, tooters, tootsie, toroids, tricots, trisect