The word antisepticizing 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: 34
Highest Scoring Words With Friends™ Play In The Letters antisepticizing
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Seven Letter Word Alert: (86 words)
ancient, antigen, aseptic, asinine, cagiest, canines, canting, capsize, casting, catenin, catnips, catting, ceasing, citizen, gentian, ignites, incants, incites, inscape, inspect, instant, instate, intents, nascent, nesting, netting, niacins, nictate, paining, panties, panting, pasting, patents, patient, patines, patties, patting, pectins, petting, pianist, piazine, picante, piecing, pietist, pinnate, pitting, seating, seizing, setting, sitting, sniping, spacing, spicate, spicing, spinnet, spiting, stannic, statice, stating, stipite, tangent, tannest, tapings, tasting, teasing, teazing, tenants, tenpins, tensing, tenting, testing, tetanic, tiepins, tiniest, tinting, tipcats, titanic, zaniest, zeatins, zesting, zincate, zincing, zincite, zingani, zinnias, zipties