The word pneumoconiosis 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: 26
Highest Scoring Words With Friends™ Play In The Letters pneumoconiosis
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Seven Letter Word Alert: (50 words)
cesiums, cession, compose, consume, copious, cosines, coupons, cousins, cuisine, eosinic, iciness, iconism, impious, imposes, incises, incomes, inosine, ionises, ionones, isospin, meiosis, menisci, minions, minuses, miscoin, miscues, mispens, mission, monsoon, muscone, noisome, nonepic, ominous, oncosis, ooscope, opinion, opossum, pension, pinions, poisons, pounces, psionic, pumices, seismic, somonis, spinons, spinose, spinous, sunnies, uncoops