The word vociferators 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: (74 words)
activer, actives, arrives, artsier, carries, carrots, carters, carvers, cavorts, coarser, coaster, cooties, corsair, coverts, crafter, craters, cravers, creator, cristae, crofter, crosier, erotica, erotics, erratic, evictor, factors, fairest, foister, footers, footsie, forcers, forties, fraters, froster, octaves, orators, ovaries, overact, oversat, oversit, raciest, rafters, reactor, recoats, recraft, rectors, refavor, refract, reroast, reroofs, reroots, rioters, roaster, roister, roofers, rooster, rooters, savorer, scarier, scooter, scoriae, serovar, sootier, starver, striver, tarries, tracers, trocars, varices, vectors, veritas, victors, viscera, voicers