The word theoretician 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: 18
Highest Scoring Words With Friends™ Play In The Letters theoretician
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Seven Letter Word Alert: (73 words)
acetone, aconite, another, arenite, cattier, certain, chainer, chanter, chariot, chatter, cheater, cheerio, citator, cithern, citrate, citrine, cittern, cornett, coterie, earthen, enactor, enteric, enticer, entreat, erotica, etaerio, etchant, etheric, hairnet, haricot, hearten, hectare, heretic, heroine, ichnite, inciter, inertia, inherit, inreach, itchier, iterate, nattier, neither, nictate, nitrate, nitrite, nittier, notcher, otarine, ratchet, rechain, recheat, reenact, reteach, ricotta, tantric, teacher, tentier, ternate, tetanic, theater, theatre, thereat, therein, thereon, thereto, thorite, tintier, titanic, trainee, tranche, triaene, trochee