The word cloverleaves 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: 25
Highest Scoring Words With Friends™ Play In The Letters cloverleaves
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Seven Letter Word Alert: (40 words)
acerose, alcoves, alveole, areoles, callers, callose, cellars, cereals, cleaver, cleaves, clovers, coalers, collars, creoles, escolar, evolver, evolves, laveers, leavers, leveler, locales, ocellar, oracles, overall, oversea, oversee, recalls, reclose, recoals, relaces, release, relevel, rescale, resolve, reveals, revolve, sclerae, scleral, several, solacer