The word phenobarbitone 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: 27
Highest Scoring Words With Friends™ Plays In The Letters phenobarbitone
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Seven Letter Word Alert: (68 words)
abortee, another, arenite, baronet, beneath, benthon, biotope, biphobe, bonnier, breathe, earthen, entrain, etaerio, hairnet, harpoon, hearten, heparin, heptane, heroine, hipbone, honoree, inepter, intoner, iophobe, nanobot, neither, neonate, nephron, niobate, nitrene, nobbier, nonhero, nonriot, operant, operate, oration, otarine, painter, panther, peatier, pentane, pertain, phenate, phonier, pinnate, pioneer, pointer, pontine, portion, potheen, potherb, preheat, prenote, probate, pronate, protean, protein, rebathe, repaint, repoint, terpine, therein, thereon, thinner, tinhorn, tobiano, trainee, triaene