The word launderette 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: 15
Highest Scoring Words With Friends™ Plays In The Letters launderette
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Seven Letter Word Alert: (40 words)
alerted, altered, attuned, deerlet, deleter, deltate, dentate, denture, detente, detuner, eluated, enteral, entered, entreat, eternal, launder, learned, lunated, natured, needler, nettled, neutral, rattled, redealt, related, retuned, taunted, taunter, tenured, ternate, treadle, treated, treelet, trundle, unalert, unalter, undealt, unrated, untread, uttered