The word incidentals 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™ Play In The Letters incidentals
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Seven Letter Word Alert: (76 words)
aedilic, ancient, anilide, aniline, annelid, asinine, candies, candles, canines, cantles, castile, castled, catenin, ciliate, citadel, cladist, clients, dacites, dailies, decalin, decants, deistic, delicts, delints, deltaic, denials, dentals, dentils, dentins, descant, destain, details, detains, dialect, diciest, dietics, dilates, discant, elastic, elastin, elicits, entails, incants, incased, incised, incited, incites, incline, indents, indians, indices, indicts, indites, inlands, inlines, instead, intends, italics, laciest, laicise, lancets, liaised, lindens, linnets, nailset, nascent, niacins, sainted, salient, scanned, sidelit, slanted, snailed, stained, stannic, stencil