The word etymologising 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: 24
Highest Scoring Words With Friends™ Play In The Letters etymologising
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Seven Letter Word Alert: (86 words)
egotism, elision, elitism, elogist, eloigns, emoting, emotion, etymons, geogony, geology, geonyms, gigolos, glisten, gnomist, googles, gooiest, goosing, gosling, ignites, inosite, instyle, iolites, isogony, isonomy, legions, lignite, lingoes, lionets, lionise, lionism, listing, longest, looming, loonies, loosing, looting, lotions, lysogen, melting, mingles, mistily, misting, mitogen, moisten, moistly, molting, mongols, moonlit, mooting, motions, motleys, myelins, myogens, noisily, noisome, oiliest, oleosin, oligist, oolites, semilog, sieging, silting, singlet, sliming, smiling, smiting, sniggle, soggily, soiling, soloing, sootily, sooting, stonily, stoolie, styling, stylion, tilings, timings, tingles, toggles, toiling, tooling, toolmen, toonies, yelming, yoginis