The word brainchildren 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: 25
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (62 words)
aedilic, airline, albinic, anilide, aniline, annelid, baldric, bedrail, biennia, birched, blander, blinder, braider, brailed, brained, brander, bridler, brindle, brinier, cairned, caliber, calibre, candler, cannier, carbide, carbine, carried, chained, chainer, chaired, channel, charier, charred, chinned, crabier, decalin, decrial, deliria, denarii, drainer, echidna, enchain, hairier, handier, handler, hardier, hernial, incline, inhaled, inhaler, inreach, lardier, rabider, radicel, radicle, rainier, ranched, rancher, randier, rebraid, rebrand, rechain