The word presumable 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 presumable
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Seven Letter Word Alert: (32 words)
amblers, amperes, bemauls, besmear, blamers, bumpers, leapers, lumbers, marbles, maulers, measure, pablums, perusal, pleaser, pleurae, plumber, presale, presume, rambles, rebales, reblame, relapse, repeals, replumb, repulse, rumbles, rumples, sampler, serumal, slumber, supreme, useable