The word antiseptics 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: 18
Highest Scoring Words With Friends™ Play In The Letters antiseptics
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Seven Letter Word Alert: (46 words)
aptness, ascents, ascites, aseptic, aspects, caseins, catnips, cesspit, iciness, incests, incises, incites, inscape, insects, inspect, instate, insteps, nictate, pansies, panties, pasties, patents, patient, patines, patties, pectins, pianist, picante, pietist, secants, seitans, septics, sestina, spastic, spicate, spinets, stances, statice, statics, statins, stipite, tetanic, tiepins, tiniest, tipcats, titanic