The word systematizing 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: 30
Highest Scoring Words With Friends™ Play In The Letters systematizing
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Seven Letter Word Alert: (68 words)
amenity, amnesty, animist, anytime, azymite, enigmas, gamiest, gayness, gneissy, gymnast, ignites, imagine, imitate, ingests, inmates, inseams, instate, magnets, massing, matings, matting, maziest, messing, miniate, mintage, misseat, missing, misting, mitiest, mittens, sagiest, satiety, sayings, seaming, seating, seitans, seizing, sestina, setting, sigmate, signets, simians, sitting, sizings, smiting, smitten, stamens, stating, statins, statism, staying, stigmas, stimies, stygian, stymies, syntagm, tasting, teaming, teasing, teazing, testing, timings, tiniest, yessing, zaniest, zeatins, zesting, zymases