The word commissioners 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: 23
Highest Scoring Words With Friends™ Plays In The Letters commissioners
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Seven Letter Word Alert: (53 words)
censors, cession, coiners, commons, cosines, cosmism, crimson, cronies, crosses, 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, osmosis, osseins, recoins, scissor, seismic, seniors, sensors, sericin, sermons, session, simmers, sissier, somonis, sooners