The word subventioning 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: 26
Highest Scoring Words With Friends™ Play In The Letters subventioning
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Seven Letter Word Alert: (56 words)
besting, binning, biotins, bitings, boniest, bonnets, bousing, bovines, bunions, bunnies, bunting, busting, ensuing, envious, eviting, igneous, ignites, innings, inosine, inosite, intones, invents, invites, nesting, niobite, nonsuit, ousting, outbegs, outgive, outings, sieving, sinning, stiving, stoning, subnote, subtone, subvein, subvent, subvote, suiting, sunning, tensing, tension, tinning, tongues, tubings, tunings, unbones, unities, uniting, uveitis, veining, venison, venting, vesting, vetoing