The word promethazine 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: 30
Highest Scoring Words With Friends™ Play In The Letters promethazine
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Seven Letter Word Alert: (73 words)
another, arenite, atheize, atomize, earthen, emirate, emptier, epitome, erotize, etaerio, hairnet, hearten, heparin, heptane, heroine, heroize, inepter, matinee, meatier, meatpie, menorah, methane, metrize, minaret, moraine, naptime, neither, onetime, operant, operate, otarine, painter, panther, peatier, pertain, phantom, phenate, phoneme, phonier, pimento, pioneer, poetize, pointer, potheen, preheat, prenote, primate, pronate, protean, protein, raiment, repaint, repoint, repoman, rhizoma, rhizome, romaine, ropeman, ropemen, tapemen, tempera, tempore, terpine, theorem, therein, thereon, tonearm, trainee, trapeze, triaene, zaptieh, zeroeth, zithern