The word lexicographer 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: 31
Highest Scoring Words With Friends™ Play In The Letters lexicographer
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Seven Letter Word Alert: (50 words)
aerogel, airhole, apogeic, caliper, calorie, caroler, charger, charier, cheaper, cheerio, chirper, cholera, choragi, chorale, choregi, clearer, coalier, coherer, earlier, elegaic, elegiac, epochal, exocarp, expirer, explore, glacier, gracile, graphic, harelip, hoarier, leacher, pelagic, percher, peregal, pergola, piercer, poacher, polaric, poleaxe, prerace, reacher, regraph, relaxer, reperch, replace, replica, replier, reprice, xerarch, xerogel