The word entomologist 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: 19
Highest Scoring Words With Friends™ Play In The Letters entomologist
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Seven Letter Word Alert: (56 words)
egotism, egotist, elogist, eloigns, emoting, emotion, glisten, glottis, gnomist, gooiest, legions, letting, lingoes, lionets, longest, looming, loonies, loosing, looting, lotions, melting, mingles, mitogen, mittens, moisten, molting, mongols, monolog, moonlit, mooting, motions, mottles, mottoes, noisome, oleosin, oolites, oolongs, otolite, ototome, semilog, setting, singlet, smitten, soloing, sooting, stoolie, testing, tingles, toilets, tooling, toolmen, toolset, toonies, tooting, tootles, tootsie