The word motorcades 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: 17
Highest Scoring Words With Friends™ Play In The Letters motorcades
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Seven Letter Word Alert: (26 words)
coasted, coaster, comedos, comrade, cordate, doctors, doormat, dotcoms, maestro, motored, octamer, osteoma, radomes, recoats, redacts, roasted, roosted, sarcode, scooted, scooter, scotoma, searoom, smarted, stardom, stormed, tearoom