The word antielectron 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 antielectron
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Seven Letter Word Alert: (88 words)
acetone, aconite, aileron, aloetic, ancient, antlion, arenite, article, calorie, cannier, cannoli, canteen, catenin, cattier, central, certain, citator, citrate, cittern, clarion, clatter, cleaner, clitter, clotter, coalier, coalite, contain, content, corneal, cornett, coterie, elation, elector, enactor, enolate, enteral, enteric, enticer, entitle, entrain, entrant, entreat, erotica, etaerio, eternal, intoner, iterate, lactone, lantern, latrine, lattice, lectern, lection, lenient, lineate, nattier, neonate, nictate, nitrate, nitrene, nonlate, nonliar, nonreal, onliner, otarine, ratline, recital, reclean, recline, reclone, reenact, reliant, retinal, retinol, retitle, retotal, ricotta, tactile, tantric, tentier, ternate, tertial, tetanic, toenail, trainee, treacle, trenail, triaene