The word arterialises 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: 13
Highest Scoring Words With Friends™ Play In The Letters arterialises
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Seven Letter Word Alert: (71 words)
aerates, aerials, aeriest, airiest, airless, alerter, aliases, arrests, artless, artsier, atlases, atresia, earless, earlier, easiest, elaters, erasers, irisate, lariats, leasers, liaises, raisers, rasters, realers, realest, realise, realist, realter, rearise, relater, relates, reliers, relists, resails, resales, reseals, reseats, resters, restirs, retails, retears, retiles, retires, retrial, retries, sailers, saltier, satires, sealers, searats, seastar, seaters, serials, seriate, serrate, sierras, siltier, slaters, slatier, starers, stealer, sterile, tarries, tarsals, tealess, tearers, tearier, teasels, teasers, tieless, trailer