The word prefectural 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 prefectural
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Seven Letter Word Alert: (42 words)
alerter, capture, careful, cartful, caterer, clearer, crafter, crueler, cutleaf, epaulet, epurate, feature, flareup, furcate, lecture, perfect, pleurae, preface, prefect, prelate, prelect, prerace, purfler, rapture, realter, recraft, recrate, reflate, reflect, refract, refutal, refuter, relater, replace, replate, repleat, retrace, taperer, tearful, terrace, treacle, treeful