The word systematizer 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: 26
Highest Scoring Words With Friends™ Plays In The Letters systematizer
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Seven Letter Word Alert: (73 words)
aeriest, artiest, artists, attires, azymite, easiest, emirate, emitter, essayer, estates, iratest, itemset, iterate, masters, mastery, matters, maziest, meatier, messier, metrise, metrist, metrize, misseat, misters, reemits, remates, reseats, resizes, restate, restems, retaste, reteams, retests, retimes, satiety, satires, seamers, seamier, seaters, seizers, seriate, seriema, setters, siamese, sitters, smartie, smatter, smiters, staters, statism, stayers, steamer, straits, streams, streamy, streets, striate, stymies, tasters, tastier, teasers, teatime, termite, tersest, testers, testier, tsarism, tsarist, tzarism, tzarist, yttrias, zestier, zymases