The word centrifugate 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: 22
Highest Scoring Words With Friends™ Play In The Letters centrifugate
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Seven Letter Word Alert: (80 words)
arenite, cantref, carting, cattier, catting, centaur, certain, citrate, cittern, crating, cuneate, curette, curtain, cutrate, cutting, engraft, enteric, enticer, entreat, eugenic, fainter, fancier, fatigue, fattier, fearing, feature, feigner, fiancee, fireant, frantic, freeing, frigate, fungate, furcate, furnace, gaunter, generic, genetic, granite, grantee, greaten, gunfire, infarct, ingraft, ingrate, integer, iterate, nattier, nictate, nitrate, nuttier, rafting, ratting, reagent, reefing, reenact, reunite, rutting, tangier, tantric, taunter, tauting, tearing, tentage, tentier, ternate, tetanic, tracing, trainee, treeing, triaene, tuftier, tufting, turfing, uncrate, uneager, unerect, ungraft, urinate, uterine