The word undertakers 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™ Play In The Letters undertakers
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Seven Letter Word Alert: (88 words)
asunder, austere, dankest, darkens, darkest, darners, darters, dearest, denture, detuner, detunes, drunker, earners, earnest, eastern, endears, endures, ensured, ensurer, erasure, errands, errants, euaster, eurekas, knarred, kneader, knurred, natured, natures, nearest, neuters, nutseed, rankers, rankest, ranters, readers, reakers, reasked, reasted, redates, renders, renters, rereads, rerents, restake, retaken, retaker, retakes, retards, retears, retrade, retread, retuned, retunes, returns, saunter, sauteed, sedater, serrate, snarked, sneaked, sneaker, standee, stander, starker, starred, sterane, sterned, sterner, tankers, tasered, tearers, tenders, tenured, tenures, terrane, traders, treader, trunked, tundras, turners, unasked, undrest, unrated, unreset, unsated, untread, ureters