The word entreaties 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: 11
Highest Scoring Words With Friends™ Plays In The Letters entreaties
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Seven Letter Word Alert: (44 words)
aeriest, antsier, arenite, artiest, attires, earnest, eastern, eeriest, entreat, entrees, entries, instate, iratest, iterate, nastier, natters, nattier, nearest, neatest, netters, nitrate, restain, restate, retains, retaste, retinas, retints, seriate, stainer, sterane, straint, striate, tastier, teenier, teeters, tenters, tentier, ternate, testier, tinters, trainee, transit, triaene, trienes