The word petrification 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: 23
Highest Scoring Words With Friends™ Play In The Letters petrification
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Seven Letter Word Alert: (66 words)
aconite, apricot, cantref, cantrip, caption, cattier, certain, citator, citrate, citrine, cittern, conifer, cornett, ectopia, enactor, erotica, faction, fainter, fancier, fattier, fiction, fireant, firepan, firepit, firepot, frantic, inciter, inertia, infarct, nattier, nepotic, nictate, niftier, nitrate, nitrite, nittier, operant, otarine, painter, patient, patriot, pattern, pertain, picante, picrate, picrite, pinfire, pointer, porcine, portent, precoat, profane, pronate, protean, protect, protein, repaint, repoint, ricotta, tantric, tetanic, tintier, tipcart, tiptoer, titanic, triptan