The word preconceives 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: 26
Highest Scoring Words With Friends™ Play In The Letters preconceives
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Seven Letter Word Alert: (45 words)
coerces, coiners, concise, copiers, cornice, covines, crevice, crispen, cronies, eccrine, encores, enviers, epicene, erosive, evinces, inverse, necrose, novices, openers, oversee, peevers, pensive, peonies, pierces, pincers, pioneer, porcine, precise, princes, receive, recipes, recoins, reopens, repines, rescope, respice, revoice, science, seepier, service, sincere, veneers, versine, version, voicers