The word subrogating 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™ Plays In The Letters subrogating
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Seven Letter Word Alert: (52 words)
abortus, abusing, agonist, agoutis, airguns, arguing, barging, basting, bastion, boating, borings, bousing, brogans, busting, garbing, gastrin, gigaton, grating, guitars, gunboat, gusting, nitrous, obtains, orating, ousting, outbrag, outgain, outgrin, outings, outsang, ragouts, rainout, ratings, rations, roguing, rousing, routing, rusting, signora, soaring, sorting, souring, staging, staring, storing, surging, tabuing, touring, tubings, turbans, unbaits, urgings