The word entomologists 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 entomologists
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Seven Letter Word Alert: (91 words)
egoisms, egoists, egotism, egotist, elogist, eloigns, emoting, emotion, enlists, glioses, glisten, glottis, gnomist, gooiest, goosies, ingests, insoles, isogons, legions, lesions, letting, lingoes, lioness, lionets, listens, longest, looming, loonies, loosens, loosest, loosing, looting, losings, lotions, melting, messing, mingles, mitogen, mitoses, mittens, moisten, molests, molting, mongols, monolog, moonlit, mooting, mossing, motions, mottles, mottoes, noisome, nosiest, notists, oleosin, oolites, oolongs, osteons, otolite, ototome, semilog, setting, signets, silents, singles, singlet, smitten, soloing, soloist, somites, somonis, soonest, sooting, stetson, stogies, stomies, stooges, stoolie, testing, tingles, tinsels, toilets, tonsils, tooling, toolmen, toolset, toonies, tooting, tootles, tootsie, tossing