The word microbiologies 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: 26
Highest Scoring Words With Friends™ Play In The Letters microbiologies
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Seven Letter Word Alert: (43 words)
begloom, bicolor, bloomer, boilers, boleros, boogers, boogies, boomers, boomier, bromise, climber, coeloms, combers, coolers, creosol, embolic, embroil, gerbils, girlies, glories, goobers, goosier, legroom, limbers, microbe, mobiles, obliger, obliges, obligor, orioles, reblogs, rebloom, reboils, reclimb, reclogs, recoils, recombs, regosol, risible, scrooge, semilog, slimier, smilier