The word cloverleafs 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: 23
Highest Scoring Words With Friends™ Play In The Letters cloverleafs
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Seven Letter Word Alert: (39 words)
acerose, alcoves, alveole, areoles, callers, callose, cellars, cereals, cleaver, cleaves, clovers, coalers, collars, creoles, escolar, fallers, fellers, flavors, florals, laveers, leavers, loafers, locales, ocellar, oracles, overall, oversea, recalls, reclose, recoals, refaces, relaces, rescale, resolve, reveals, sclerae, scleral, several, solacer