The word treasonable 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 treasonable
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Seven Letter Word Alert: (83 words)
abalone, abaters, abators, ablates, ablator, abortee, abreast, aerates, antlers, arblast, areolae, areolas, areoles, arsenal, atoners, baleens, banaler, banters, baronet, beaters, berates, blaster, bleater, bloater, boaster, boaters, boletes, bolster, bolters, bonelet, boneset, boranes, borates, boreens, earlobe, earnest, eastern, eatable, elaters, enabler, enables, enolase, enolate, enrobes, enteral, estrone, eternal, lateens, leaners, leanest, leantos, loaners, lobster, nabales, nearest, noblest, notable, oleates, orleans, realest, rebales, rebates, reblast, reblent, reboast, relates, relents, reloans, rentals, reslant, roseate, roselet, saltern, sealant, senator, sorbate, stabler, stealer, sterane, sternal, tenable, treason, trebles