The word biogeographical 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 biogeographical
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Seven Letter Word Alert: (64 words)
achiral, acholia, aerobic, airable, aircool, airhole, algebra, apogaic, apogeal, apogeic, archeal, baggier, bicolor, bigraph, biochip, bipolar, blogger, blooper, boggier, brachia, brioche, caliber, calibre, caliper, calorie, capable, carpool, cholera, choragi, chorale, choregi, clogger, coalbag, coalier, epochal, garbage, glacier, goopier, gracile, graphic, haggler, haircap, harelip, icepail, iophobe, liriope, loopier, obliger, obligor, parable, paralog, parboil, pelagic, pergola, phobiac, piggier, placebo, poacher, polaric, preboil, precool, regalia, replica, ribcage