The word nitrogenous 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 nitrogenous
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Seven Letter Word Alert: (78 words)
ensuing, erosion, goiters, goitres, gooiest, goosier, goriest, goutier, gunners, gunters, gustier, gutsier, igneous, ignores, interns, intoner, intones, introns, inturns, ionogen, ionones, nesting, neurons, neutron, nitrous, nonriot, nonsuit, nonuser, noosing, norites, notions, nursing, nutsier, onerous, oogenus, orients, orogens, ousting, outgoes, outgrin, outings, regions, renting, resting, reunion, reusing, riotous, rooting, rousing, routine, routing, rusting, snoring, sootier, sooting, sorting, souring, stinger, stonier, stoning, storing, stourie, stunner, sunnier, surgeon, tensing, tension, tinners, tongues, tonsure, toonies, torsion, touring, triones, tunings, turning, uniters, unrisen