The word nitrogenising 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: 20
Highest Scoring Words With Friends™ Play In The Letters nitrogenising
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Seven Letter Word Alert: (56 words)
gingers, ginning, ginseng, girning, goiters, goitres, goriest, igniter, ignites, ignitor, ignores, innings, inosine, inosite, interns, intoner, intones, introns, ioniser, ironies, ironing, nesting, noisier, norites, orients, origins, regions, reining, rennins, renting, resting, ringgit, ringing, rinsing, rioting, serging, sieging, signing, singing, sinning, snogger, snoring, soggier, sorting, stinger, stonier, stoning, storing, tensing, tension, tiering, tinging, tinners, tinnier, tinning, triones