The word lexicographical 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: 37
Highest Scoring Words With Friends™ Play In The Letters lexicographical
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Seven Letter Word Alert: (64 words)
achiral, acholia, aircell, airhole, alcogel, allegro, apogaic, apogeal, apogeic, apraxic, archaic, archeal, axillae, axillar, caliche, calicle, caliper, caloric, calorie, chalice, chiller, chloral, choicer, choleic, cholera, choragi, chorale, choregi, cloacae, cloacal, coalier, coaxial, cochair, cochlea, coeliac, collage, collier, epochal, exocarp, glacial, glacier, gorilla, gracile, graphic, haircap, harelip, helical, icepail, illogic, lexical, liriope, logical, ocellar, paralog, pelagic, pergola, phallic, pillage, poacher, polaric, pollaxe, rechill, regalia, replica