The word exterminating 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: 27
Highest Scoring Words With Friends™ Play In The Letters exterminating
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Seven Letter Word Alert: (90 words)
airtime, antigen, arenite, axinite, earning, eminent, emirate, emitter, enamine, entrain, entrant, entreat, examine, exigent, exiting, extrema, garment, gatemen, gentian, germane, granite, grantee, greaten, igniter, imagine, imitate, inertia, ingrain, ingrate, integer, interim, iterate, mangier, martini, matinee, matting, meaning, meatier, meeting, migrant, migrate, minaret, miniate, mintage, mintier, minting, nattier, nearing, netting, nitrate, nitrene, nitrite, nittier, ragtime, raiment, raining, ranting, ratting, reagent, reaming, reannex, regimen, regnant, reimage, reining, remnant, renting, ringman, ringmen, tangent, tangier, taxiing, teaming, tearing, teatime, teeming, tentage, tentier, tenting, termini, termite, ternate, texting, tiering, tinnier, tintier, tinting, trainee, treeing, triaene