The word summersaults 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 summersaults
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Seven Letter Word Alert: (45 words)
amulets, armless, armlets, artless, asserts, assumer, assumes, assures, auteurs, estrual, estrums, lusters, masseur, masters, matures, maulers, museums, mussels, musters, mutuals, results, rumless, russets, rustles, saluter, salutes, serumal, slammer, slaters, slummer, stammer, streams, summate, summers, sutlers, sutural, sutures, taluses, tassels, tramels, trammel, trusses, tummler, tussles, umlauts