The word intercalation 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 intercalation
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Seven Letter Word Alert: (84 words)
aconite, aeolian, aileron, airline, alanine, alicant, aloetic, ancient, aniline, anionic, antlion, article, calorie, cannier, cannoli, carinae, carinal, catenin, cattail, cattier, central, certain, ciliate, citator, citrate, citrine, cittern, clarion, clatter, clitter, clotter, coalier, coalite, coaltar, contain, content, corneal, cornett, cranial, elation, enactor, entrain, entrant, erotica, inciter, incline, inertia, intoner, lacinia, lactate, lactone, lantern, latrine, lattice, lection, lintier, nattier, nictate, nitrate, nitrite, nittier, nonlate, nonliar, nonreal, onliner, otarine, ratline, rattail, recital, reliant, retinal, retinol, retotal, ricotta, tactile, tantric, teacart, tertial, tetanic, tinnier, tintier, titanic, toenail, trenail