The word fraternizing 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: 28
Highest Scoring Words With Friends™ Play In The Letters fraternizing
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Seven Letter Word Alert: (56 words)
angrier, antigen, earning, earring, engraft, entrain, faining, fainter, fairing, fanzine, fearing, feazing, fireant, firring, frigate, fringer, gentian, grafter, grainer, granite, granter, grinner, igniter, inertia, ingraft, ingrain, ingrate, nearing, niftier, rafting, rainier, raining, rangier, ranting, rearing, refrain, regnant, regraft, regrant, reining, renting, retrain, rifting, ritzier, tangier, tarring, tearing, teazing, terrain, tiering, tinnier, trainer, zingani, zingare, zingari, zingier