The word persuadable 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: 20
Highest Scoring Words With Friends™ Play In The Letters persuadable
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Seven Letter Word Alert: (45 words)
abludes, abrades, abrased, bedares, bedlars, belauds, daubers, dealers, debaser, duelers, durable, elapsed, eluders, leaders, leapers, parable, parades, pearled, perusal, perused, pleader, pleased, pleaser, pleurae, predeal, prelude, presale, radulae, radulas, rebaled, rebales, rebased, redeals, relapse, repeals, replead, repulse, respade, sabered, sepaled, slurped, speared, subarea, supered, useable