The word secularises 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: 16
Highest Scoring Words With Friends™ Plays In The Letters secularises
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Seven Letter Word Alert: (57 words)
airless, assures, auricle, carless, causers, celsius, cereals, cerises, classes, clauses, creases, cresses, cruises, curials, cussers, earless, eclairs, euclase, iceless, issuers, lassies, leasers, leisure, realise, reclass, recluse, recusal, recuses, reissue, relaces, resails, resales, rescale, rescues, reseals, reslice, sacless, sailers, sassier, saucers, saucier, scalers, scalier, sclerae, scleras, sealers, secular, secures, serials, sessile, slicers, sluicer, sluices, sucrase, ureases, uricase, useless