The word immunologists 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 immunologists
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Seven Letter Word Alert: (57 words)
gliosis, gnomist, insults, isogons, issuing, lionism, listing, logouts, looming, loosing, looting, losings, lotions, lousing, lusting, minimus, missing, mission, missuit, misting, mitosis, molting, mongols, moonlit, mooting, mossing, motions, moulins, mousing, musings, muslins, oligist, ominous, osmiums, ousting, outings, silting, sliming, smiling, smiting, soiling, soloing, soloist, somonis, sooting, stimuli, suiting, summing, summits, summons, tilings, timings, toiling, tonsils, tooling, tossing, unlists