The word incarcerating 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 incarcerating
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Seven Letter Word Alert: (60 words)
accinge, actinic, agatine, ancient, angrier, antigen, arraign, arrange, cannier, canting, carinae, carnage, cartage, carting, catenin, centric, certain, citrine, craning, crating, cringer, earning, earring, entrain, erratic, gentian, grainer, granite, granter, grinner, icteric, igniter, inciter, inertia, ingrain, ingrate, narrate, nearing, racecar, rainier, raining, rangier, ranting, ratrace, rearing, regnant, regrant, reicing, reining, renting, retrain, tanager, tangier, tarring, tearing, terrain, tiering, tinnier, tracing, trainer