The word charlatanism 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™ Plays In The Letters charlatanism
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Seven Letter Word Alert: (42 words)
achiral, alicant, almanac, amanita, amastia, amritas, anarchs, animals, arctans, artisan, artsman, canasta, cariama, carinal, cranial, laminar, laminas, lariats, mailcar, malacia, malaria, maniacs, mantras, maracas, marasca, marinas, marital, marlins, marshal, martial, martian, martins, mascara, mistral, rainhat, sariama, satanic, stamina, tarmacs, tarnish, thalami, tsarina