The word saunterer 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: 11
Highest Scoring Words With Friends™ Play In The Letters saunterer
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Seven Letter Word Alert: (27 words)
austere, earners, earnest, eastern, ensurer, erasure, errants, euaster, natures, nearest, neuters, ranters, renters, rerents, retears, retunes, returns, saunter, serrate, sterane, sterner, tearers, tenures, terrane, turners, unreset, ureters