The word serenading 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: 15
Highest Scoring Words With Friends™ Play In The Letters serenading
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Seven Letter Word Alert: (45 words)
adenine, angered, aniseed, dangers, darning, dearies, deniers, deraign, derange, dinners, earning, endears, endings, engined, engines, enraged, enrages, ensnare, erasing, gainers, ganders, gardens, genders, grained, greased, greisen, grenade, grinned, innards, insaner, nearing, needing, readies, reading, regains, reigned, rending, sandier, sanding, sardine, searing, sedgier, seeding, sending, snaring