The word refurnishes 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: 18
Highest Scoring Words With Friends™ Play In The Letters refurnishes
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Seven Letter Word Alert: (41 words)
ensurer, ensures, ferries, finesse, fishers, fissure, freshen, fresher, fuehrer, fuhrers, furnish, furries, fussier, heifers, heiress, hurries, infuser, infuses, insurer, insures, nursers, refiner, refines, refires, refresh, refries, refuser, refuses, rehires, reissue, rerinse, reshine, rinsers, rushers, sherifs, shiners, shrines, sunfish, sunrise, surfers, usherer