The word centrifuged 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
Seven Letter Word Alert: (50 words)
centred, cringed, definer, defunct, denture, detinue, detuner, ducting, educing, enteric, enticed, enticer, eructed, erudite, eugenic, feeding, feigned, feigner, feuding, figured, freeing, fringed, fruited, generic, genetic, grunted, gunfire, inducer, integer, intrude, recited, reefing, refined, refuged, refuted, reguide, reigned, retuned, reunite, tenured, treeing, trudgen, turfing, uncited, unerect, unfired, unfreed, untired, untried, uterine