The word cornetfish 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: 19
Highest Scoring Words With Friends™ Play In The Letters cornetfish
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Seven Letter Word Alert: (45 words)
cistern, cithern, cithers, citrons, coheirs, coiners, confers, confits, conifer, cornets, cretins, cronies, erotics, ethnics, finches, fishnet, foister, forints, forties, heroics, heroins, histone, hornets, inchers, infects, inshore, norites, notcher, notches, notices, orients, ostrich, recoins, reshift, rhotics, richest, section, shifter, shorten, snifter, stonier, thiones, thrones, torches, triones