The word meadowgrasses 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: 22
Highest Scoring Words With Friends™ Play In The Letters meadowgrasses
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Seven Letter Word Alert: (51 words)
agarose, amassed, amasses, awardee, awesome, damager, damages, degases, degerms, deworms, dogears, dosages, dowager, dowress, dowsers, dresses, drowses, gassers, grassed, grasses, greased, greases, grossed, grosses, massage, meadows, megarad, meowers, message, oarweed, radomes, ragweed, readmes, remowed, resawed, resowed, seadogs, seagoer, seamers, seaward, seaworm, seesaws, sesames, smeared, sodgers, swarmed, wagered, wardogs, wargame, wordage, wrasses