The word interrogator 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: 15
Highest Scoring Words With Friends™ Play In The Letters interrogator
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Seven Letter Word Alert: (42 words)
angrier, attirer, earring, garotte, grainer, granite, granter, gritter, groaner, ingrate, ironage, nattier, nitrate, notator, oranger, orating, oration, oregano, ornater, otarine, rangier, rattier, ratting, rattoon, rearing, regrant, retrain, roaring, rooting, rotator, rotting, tangier, tarrier, tarring, tearing, terrain, terroir, tooting, tornote, torrent, trainer, traitor