The word stonewaller 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: 17
Highest Scoring Words With Friends™ Plays In The Letters stonewaller
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Seven Letter Word Alert: (55 words)
antlers, areoles, atoners, earnest, eastern, elaters, enolase, enolate, enrolls, enteral, estrone, eternal, lateens, leaners, leanest, leantos, loaners, nearest, oleates, orleans, realest, reallot, reallow, relates, relents, reloans, renewal, rentals, reslant, reswell, retells, roseate, roselet, saltern, seaworn, senator, stealer, stellar, sterane, sternal, stollen, sweater, sweller, swelter, swollen, tallows, tellers, tollers, treason, trowels, wallets, wanters, western, wrenlet, wrestle