The word floundering 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 floundering
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Seven Letter Word Alert: (56 words)
dilogun, direful, droning, dueling, dungeon, eluding, eroding, fending, feuding, figured, firedog, floured, folding, fondler, foreign, fouling, founder, fringed, fueling, funding, fungoid, funnier, furling, furlong, gloried, godlier, grinned, groined, guerdon, guilder, gunfire, ignored, indulge, inferno, inuendo, lending, longfin, longrun, lounged, lounger, negroid, nondrug, nonfire, nonlife, onliner, redoing, refound, regulon, rending, reunion, roundel, undergo, undoing, unfired, unlined, unoiled