The word vociferates 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: 21
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (57 words)
acerose, activer, actives, aeriest, cavorts, cerates, coaster, coesite, coterie, coverts, coveter, creates, cristae, erosive, erotica, erotics, erotise, etaerio, evictor, evocate, factors, faeries, fairest, festive, foister, forties, foveate, freesia, octaves, ovaries, overact, overate, overeat, oversat, oversea, overset, oversit, raciest, recites, recoats, refaces, refects, restive, revoice, revotes, roseate, scoriae, seriate, service, sievert, varices, vectors, veritas, vetoers, victors, viscera, voicers