The word reharmonise 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 reharmonise
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Seven Letter Word Alert: (55 words)
animose, anomers, armoire, arsheen, arshine, earners, enamors, haemins, hearers, hernias, heroine, heroins, heroise, heroism, hoarier, hoarser, hornier, horsier, inshore, ironers, isomere, mariner, marines, marries, meanies, menorah, meshier, mishear, moaners, moraine, oarsmen, reamers, rearise, rearose, reharms, rehears, rehires, rehomes, rehones, remains, remines, remorse, renames, rerinse, reshare, reshine, reshore, roamers, romaine, seamier, seminar, seriema, shearer, sirname, smearer