The word drainpipes 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 drainpipes
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Seven Letter Word Alert: (33 words)
airpipe, airside, appends, apprise, aspired, aspirin, dairies, dappers, denarii, despair, diapers, diaries, dippers, dippier, insider, inspire, nappers, nappies, nippers, nippier, panders, parsnip, pinesap, praised, prepaid, sandier, sappier, sardine, snapped, snapper, snipped, snipper, spinier