The word benefactors 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: 21
Highest Scoring Words With Friends™ Play In The Letters benefactors
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Seven Letter Word Alert: (70 words)
abortee, absence, acerose, acetone, atoners, banters, baronet, beacons, beaters, berates, boaster, boaters, boneset, boranes, borates, boreens, canoers, canters, cantors, cantref, carbeen, carbene, carbons, careens, cartons, cenotes, centers, centres, cerates, coarsen, coaster, confabs, confers, corneas, cornets, cratons, creates, earnest, eastern, enactor, encores, enforce, enrobes, estrone, factors, fencers, forseen, nearest, necrose, nectars, obscene, octanes, octenes, oftener, rebates, reboast, recanes, recants, recoats, reenact, refaces, refects, roseate, scanter, scenter, senator, sorbate, sterane, trances, treason