The word sympetalous 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: 21
Highest Scoring Words With Friends™ Play In The Letters sympetalous
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Seven Letter Word Alert: (41 words)
alyssum, amplest, ampoule, amulets, apostle, asylums, autopsy, employs, eustasy, layouts, lotuses, lysates, maltose, mapless, maypole, molests, motleys, outlays, outleap, outplay, outyelp, passout, pastels, payouts, plumose, pulsate, pumelos, salutes, samples, seamost, septums, solutes, spousal, staples, stylops, systole, taluses, topless, tousles, toyless, tyloses