The word commissioner 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 commissioner
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Seven Letter Word Alert: (46 words)
censors, cession, coiners, commons, cosines, cosmism, crimson, cronies, eosinic, erosion, iciness, iconism, incises, incisor, incomer, incomes, ioniser, ionises, ionomer, irenics, ironies, isomers, meiosis, memoirs, menisci, microns, mimesis, mincers, miscoin, mission, monomer, moronic, mossier, noisier, noisome, noosers, omicron, oncosis, recoins, seismic, seniors, sericin, sermons, simmers, somonis, sooners