The word pterosaurs 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: 14
Highest Scoring Words With Friends™ Plays In The Letters pterosaurs
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Seven Letter Word Alert: (67 words)
arouser, arouses, arrests, estrous, oestrus, ousters, outraps, outspar, parrots, parsers, passout, pasters, pastors, pasture, porters, poseurs, posters, posture, pourers, pouters, praetor, praters, presort, prorate, protura, pursers, raptors, rapture, raspers, rasters, repasts, reports, reposts, repours, reroast, resorps, resorts, respots, restrap, retours, retraps, roaster, rosters, routers, seaport, soapers, soarers, sorters, sourest, sparers, sparest, sparser, spouter, sprouts, spurter, starers, stupers, stupors, toruses, tourers, trouper, troupes, trouser, uprates, uprears, uproars, urostea