The word maidenhairs 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™ Plays In The Letters maidenhairs
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Seven Letter Word Alert: (46 words)
admires, airhead, airside, amnesia, arshine, ashamed, dairies, damners, denarii, dharmas, dharnas, diamine, diaries, dirhams, haemins, handers, handier, hardens, headman, hernias, hinders, insider, maidens, marinas, marines, medians, midairs, midrash, minders, mishear, misread, radians, remains, remands, reminds, sandier, sardine, seamaid, seminar, shadier, shinier, shrined, sidearm, sideman, siriema, sirname