The word nitrogenises 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: 16
Highest Scoring Words With Friends™ Play In The Letters nitrogenises
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Seven Letter Word Alert: (92 words)
egoists, engines, engross, ensigns, entries, erotise, estrone, genesis, goiters, goitres, goriest, greisen, igniter, ignites, ignitor, ignores, ingests, ingress, inosine, inosite, inserts, integer, intense, interns, intoner, intones, introns, ioniser, ionises, ironies, ironing, negroes, nesters, nesting, nitrene, noisier, norites, nosiest, oneness, orients, origins, regents, regions, reining, renests, rennets, renting, resents, resigns, resting, rinsing, rioting, risings, rosiest, seitens, seniors, sensing, sestine, signees, signers, signets, signors, singers, sinners, sinters, snoring, soirees, sonnets, sorties, sorting, stenose, stereos, stinger, stogies, stoners, stonier, stoning, stories, storing, strings, tenners, tensing, tension, tensors, tiering, tigress, tinners, tinnier, tossing, treeing, trienes, triones