The word fraternises 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: 15
Highest Scoring Words With Friends™ Play In The Letters fraternises
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Seven Letter Word Alert: (96 words)
aeriest, antsier, arenite, arrests, artsier, earners, earnest, easiest, eastern, ensears, entries, erasers, errants, faeries, fainter, fairest, fastens, fatness, ferrets, ferries, ferrite, festers, fiestas, finesse, fireant, fitness, fraters, freesia, inerter, infests, inserts, instars, nastier, nearest, nesters, rafters, raisers, ranters, rasters, rearise, refiner, refines, refires, refrain, refrets, refries, reinter, renests, renters, rerents, rerinse, reseats, resents, resifts, restain, resters, restirs, retains, retears, retinas, retires, retrain, retries, rinsers, sateens, satires, seaters, seitans, seitens, senates, sensate, seriate, serrate, sestina, sestine, sierras, sifters, sinters, snarers, snifter, stainer, starers, sterane, sterner, strains, strifes, tarries, tearers, tearier, teasers, terrain, terrane, trainee, trainer, triaene, trienes