The word practitioner 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: 19
Highest Scoring Words With Friends™ Play In The Letters practitioner
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Seven Letter Word Alert: (77 words)
aconite, airport, apricot, attirer, cantrip, caption, carport, carrion, cattier, certain, citator, citrate, citrine, cittern, cornett, cornier, creator, critter, ectopia, enactor, erotica, erratic, inciter, inertia, nattier, nepotic, nictate, nitrate, nitrite, nittier, operant, ornater, otarine, painter, partner, patient, patriot, pattern, pertain, picante, picrate, picrite, pointer, porcine, portent, praetor, prairie, prancer, precoat, pricier, printer, pronate, prorate, protean, protect, protein, rainier, rattier, reactor, repaint, repoint, reprint, retract, retrain, ricotta, tantric, terrain, tetanic, tintier, tipcart, tiptoer, titanic, torrent, tractor, trainer, traitor, triptan