The word centennials 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 centennials
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Seven Letter Word Alert: (35 words)
ancient, canines, canteen, cantles, castile, catenin, cleanse, clients, elastic, elastin, entails, entices, incants, incense, intense, laciest, lancets, lateens, leanest, lenient, lenites, license, lineate, linnets, nailset, nannies, nascent, neatens, salient, scalene, silence, stannic, stencil, tannins, tensile