The word stepladder 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: 16
Highest Scoring Words With Friends™ Play In The Letters stepladder
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Seven Letter Word Alert: (74 words)
adepter, alerted, altered, deadest, dealers, dearest, delated, delates, deleads, departs, elapsed, elaters, ladders, leaders, leapers, padders, paddler, paddles, palters, pearled, pedaled, peddler, peddles, pelters, pestled, petaled, petards, petrels, plaster, platers, pleaded, pleader, pleased, pleaser, pleated, predate, predeal, prelate, presale, realest, reasted, redated, redates, reddest, redeals, redealt, redtape, relapse, related, relates, repaste, repeals, repeats, replate, replead, repleat, respade, respelt, retaped, retapes, saddler, sedated, sedater, sepaled, sledder, speared, stapled, stapler, stealer, stepdad, tapered, tasered, treaded, treadle