The word bicentennials 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: 23
Highest Scoring Words With Friends™ Plays In The Letters bicentennials
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Seven Letter Word Alert: (61 words)
absence, albinic, albites, albitic, alibies, ancient, aniline, asinine, astilbe, baleens, beanies, biennia, blastic, cabinet, canines, canteen, cantles, castile, catenin, ciliate, citable, cleanse, clients, elastic, elastin, elicits, enables, entails, entices, incants, incense, incites, incline, inlines, intense, italics, laciest, laicise, lancets, lateens, leanest, lenient, lenites, lesbian, libates, license, lineate, linnets, nailset, nannies, nascent, neatens, niacins, salient, scalene, silence, stannic, stencil, tannins, tenable, tensile