The word presumably 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: 23
Highest Scoring Words With Friends™ Play In The Letters presumably
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Seven Letter Word Alert: (29 words)
ablepsy, amblers, barleys, bemauls, blamers, bumpers, lamprey, lumbers, marbles, maulers, pablums, parleys, parsley, perusal, players, plumber, prebuys, rambles, replays, replumb, rumbles, rumples, sampler, serumal, slumber, sparely, splayer, useably, yaupers