The word actinomycosis 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: 25
Highest Scoring Words With Friends™ Play In The Letters actinomycosis
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Seven Letter Word Alert: (49 words)
accosts, actinic, actions, animist, atomics, atonics, caconym, caisson, casinos, cassoon, cations, cocoyam, consist, cystoma, cytomas, cytosis, iconism, iconist, isonomy, isonyms, mascots, masonic, miscast, miscoin, mission, mitosis, mosaics, motions, mycosis, mycotic, myosins, myotics, mystics, nicosia, oncosis, oncotic, oocysts, oocytic, oomancy, osmotic, sciatic, scotoma, simians, sitcoms, somatic, somitic, somonis, tocsins, tycoons