The word recognisance 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: 22
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (72 words)
accinge, acerose, agnosic, agonies, agonise, arcsine, arsenic, cancers, canines, cannier, canoers, canonic, careens, cargoes, carnies, ceasing, coarsen, cocaine, coerces, cognacs, cognise, coinage, coiners, concern, concise, consign, coreign, corneas, cornice, corning, corsage, craning, cringes, cronies, earning, eccrine, encores, engines, enrages, ensnare, erasing, gainers, generic, greisen, ignores, incense, insaner, ironage, nearing, necrose, negroes, oceanic, oranges, organic, recanes, recoins, regains, regions, roaning, scanner, scaring, science, scoriac, scoriae, scoring, seagoer, searing, signora, sincere, snaring, snoring, soaring