The word salmonellosis 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 salmonellosis
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Seven Letter Word Alert: (30 words)
aimless, animose, illness, inseams, insoles, lassies, lassoes, lesions, lessons, lioness, loonies, loosens, manless, missals, noisome, oleosin, osmosis, osseins, salines, salmons, saloons, sealion, seasons, seminal, session, silanes, sinless, slaloms, somonis, sonless