The word understate 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: 13
Highest Scoring Words With Friends™ Plays In The Letters understate
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Seven Letter Word Alert: (71 words)
astuter, asunder, attends, attuned, attunes, austere, dearest, dentate, denture, detents, detuner, detunes, earnest, eastern, endears, endures, ensured, entreat, entrust, estuate, euaster, natters, natured, natures, nearest, neatest, netters, neuters, nutseed, nutters, reasted, redates, restate, retaste, retuned, retunes, saunter, sauteed, sedater, standee, stander, started, statued, stature, stented, sterane, sterned, student, stunted, stunter, tasered, taunted, taunter, tautens, tenders, tenters, tenured, tenures, ternate, tetanus, treated, truants, trusted, trustee, tundras, undrest, unrated, unreset, unsated, untread, uttered