The word minesweepings 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: 26
Highest Scoring Words With Friends™ Plays In The Letters minesweepings
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Seven Letter Word Alert: (35 words)
enemies, engines, ensigns, epigene, geneses, genesis, gipsies, impinge, messing, mispens, missing, misween, nemesis, newness, newsmen, penises, pennies, pigmies, pinenes, seeming, seeping, sensing, sewings, siemens, signees, sniping, spewing, swiping, weening, weeping, wienies, wimping, wingmen, wisemen, wisping