The word anesthetics 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: 17
Highest Scoring Words With Friends™ Plays In The Letters anesthetics
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Seven Letter Word Alert: (45 words)
achenes, achiest, aitches, ascents, ascites, ashiest, atheise, atheist, caseins, chaises, chasten, easiest, encases, entices, estates, etchant, ethanes, ethnics, hastens, hessite, incests, insects, instate, neatest, nictate, sachets, sateens, scathes, seances, secants, seitans, seitens, senates, sensate, sestina, sestine, stances, statice, statics, statins, teaches, techies, tensest, tetanic, theists