The word lowercases 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: 17
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (39 words)
acerose, areoles, aweless, carless, cereals, clawers, closers, coalers, creases, creoles, cresols, crewels, earless, escolar, escrows, lassoer, leasers, leasows, oarless, oracles, reclass, reclose, recoals, relaces, resales, rescale, reseals, resoles, scalers, sclerae, scleras, scowler, scrawls, seacows, sealers, solacer, solaces, warless, weasels