The word stepparents 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: 18
Highest Scoring Words With Friends™ Plays In The Letters stepparents
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Seven Letter Word Alert: (69 words)
aptness, asperse, earnest, eastern, ensears, entraps, entreat, estates, nappers, natters, nearest, neatest, nesters, netters, panters, parents, pasters, patents, pattern, patters, pesters, petnaps, present, presets, pretans, pretape, pretest, renests, repaste, repasts, repeats, repents, reseats, resents, resnaps, respans, restate, resteps, retapes, retaste, retests, sappers, sateens, seaters, senates, sensate, septate, septets, serapes, serpent, setters, snapper, sparest, spatter, staters, stepper, steppes, sterane, streets, tappers, tapster, tasters, teasers, tensest, tenters, ternate, tersest, testers, trepans