The word permanganates 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 permanganates
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Seven Letter Word Alert: (96 words)
aerates, agamete, agarans, amperes, anagram, anapest, aptamer, argents, artsman, artsmen, earnest, eartags, eastern, emanate, engrasp, enrages, ensnare, entraps, gametes, garment, garnets, gateman, gatemen, gearset, germane, grantee, greaten, magenta, magnate, magnets, manager, manages, manatee, mangers, manners, mantrap, mantras, margate, martens, meanest, menages, nametag, nearest, neatens, negates, paangas, pageant, panters, parents, pargets, peasant, penname, penners, pentane, pregame, presage, present, pretans, rampage, rampant, reagent, regents, regnant, remates, remnant, renames, rennets, repages, repaste, repeats, repents, restage, restamp, retapes, reteams, segment, serpent, smarten, spanner, spartan, stamper, steamer, sterane, strange, tampers, tanager, tangram, tanners, tapeman, tapemen, tarpans, teargas, tempera, tempers, tenners, trepans