The word treponemas 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: 17
Highest Scoring Words With Friends™ Play In The Letters treponemas
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Seven Letter Word Alert: (72 words)
amperes, anomers, artsmen, atoners, earnest, eastern, emoters, enamors, entraps, estrone, maestro, martens, matrons, meanest, mentors, meronts, meteors, moaners, monster, nearest, oarsmen, onestep, openers, openest, operant, operate, panters, parents, patrons, pentose, persona, postern, postman, postmen, poteens, prenote, present, pretans, pronate, pronest, protean, remates, remotes, renames, reopens, repaste, repeats, repents, repoman, restamp, retapes, reteams, ropeman, ropemen, roseate, seaport, senator, serpent, smarten, stamper, steamer, sterane, stomper, tampers, tampons, tapemen, tempera, tempers, tempore, tonearm, treason, trepans