The word cornetist 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: 13
Highest Scoring Words With Friends™ Play In The Letters cornetist
:
Seven Letter Word Alert: (24 words)
cistern, citrons, cittern, coiners, contest, cornets, cornett, cotters, cretins, cronies, erotics, intorts, norites, notices, orients, recoins, retints, section, snotter, stonier, tinters, tricots, triones, trisect