The word interrogating 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 interrogating
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Seven Letter Word Alert: (78 words)
angrier, antigen, atoning, attirer, earning, earring, entrain, entrant, gaining, gaiting, garotte, gearing, gentian, getting, gigaton, girning, grainer, granite, granter, grating, grinner, gritter, groaner, igniter, ignitor, inertia, ingrain, ingrate, intoner, ironage, ironing, nattier, nearing, netting, nitrate, nitrite, nittier, oranger, orating, ornater, otarine, raggier, rainier, raining, rangier, ranging, ranting, rattier, ratting, rearing, regnant, regrant, reining, renting, retrain, ringgit, ringing, rioting, roaning, roaring, rotting, taggier, tangent, tangier, tarring, tearing, tenting, terrain, tiering, tinging, tinnier, tintier, tinting, tonnage, torrent, trainer, traitor, trigger