The word accessorial 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: 18
Highest Scoring Words With Friends™ Plays In The Letters accessorial
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Seven Letter Word Alert: (53 words)
aerials, airless, aliases, areolas, calicos, caloric, calorie, carcass, carless, celosia, circles, ciscoes, classic, clerics, cloacae, cloacas, closers, coalers, coalier, coalise, coeliac, cresols, eclairs, escolar, lassoer, lossier, oarless, oracles, ossicle, rascals, reclass, recoals, recoils, resails, resoils, rosacea, rosalic, sacrals, sailers, sailors, scalars, scalers, scalier, scleras, scoriac, scoriae, scorias, serials, slicers, soccers, socials, solacer, solaces