The word precentors 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: 17
Highest Scoring Words With Friends™ Play In The Letters precentors
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Seven Letter Word Alert: (45 words)
cenotes, centers, centres, corners, cornets, encores, erector, estrone, necrose, octenes, onestep, openers, openest, pectens, pectose, pentose, percent, porters, postern, poteens, precent, prenote, present, presort, pronest, rectors, renters, reopens, repents, reports, reposer, rerents, rescope, rescore, respect, restore, scenter, scepter, sceptre, scorner, serpent, snorter, specter, spectre, sterner