The word anaesthetising 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: 20
Highest Scoring Words With Friends™ Play In The Letters anaesthetising
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Seven Letter Word Alert: (78 words)
against, agatine, agatise, agitate, anginas, antigen, ashiest, asinine, atheise, atheist, attains, easiest, engines, ensigns, estates, ethanes, geishas, genesis, gentian, gestate, gnashes, hastate, hastens, hatting, heating, hessite, hinnies, hinting, hissing, hitting, ignites, ingests, insight, instant, instate, intense, intents, neatens, neatest, negates, nesting, netting, nightie, sagiest, sashing, sateens, satiate, seating, seitans, seitens, senates, sensate, sensing, sestina, sestine, setting, shining, siennas, signees, signets, sitting, stating, statins, tangent, tannest, tasting, teasing, tenants, tensest, tensing, tentage, tenting, testing, theists, tighten, tiniest, tinting, tithing