The word reconnaissance 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: 23
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (70 words)
acerose, ancress, arcsine, arsenic, caisson, cancans, cancers, canines, cannier, cannons, canoers, canonic, carcass, careens, carinae, carnies, caseins, casinos, censers, censors, cerises, cession, ciscoes, coarsen, cocaine, coerces, coiners, concern, concise, corneas, cornice, cosines, creases, cronies, eccrine, encases, encores, ensears, ensnare, incense, insaner, nannies, necrose, nonanes, nonenes, nonsane, noseans, oceanic, oneness, reasons, recanes, recoins, rennins, rescans, rosacea, scanner, science, sconces, scoriac, scoriae, scorias, screens, seances, secerns, seniors, siennas, sincere, sinners, soccers, soirees