The word plasticizer 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: 27
Highest Scoring Words With Friends™ Play In The Letters plasticizer
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Seven Letter Word Alert: (75 words)
airiest, aplites, aplitic, article, aseptic, caliper, caplets, capsize, carpels, carpets, cartels, castile, ciliate, clarets, clasper, clipart, crazies, cristae, czarist, eclairs, elastic, elicits, icepail, icespar, irisate, italics, laciest, laicise, laicize, laziest, palters, parcels, parties, pastier, pelitic, piarist, picrate, picrite, pilates, pirates, pitiers, placers, plaster, plastic, platers, plicate, precast, raciest, realist, recital, reclasp, reclips, replait, replica, resplit, retails, saltier, satiric, scalier, scalper, scarlet, siltier, slatier, spacier, special, spectra, spicate, spicier, splicer, stapler, tipsier, traipse, triceps, triples, zipties