The word plasminogen 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: 22
Highest Scoring Words With Friends™ Play In The Letters plasminogen
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Seven Letter Word Alert: (76 words)
agonies, agonise, agonism, alpines, amnions, animose, eloigns, eloping, enigmas, epilogs, epsilon, geminal, genials, geomaps, glimpse, gliomas, gmelina, goalies, imagoes, impales, impanel, lapsing, leaning, leaping, leasing, legions, lensing, lineman, lingoes, lipomas, loaning, magnons, magpies, maligns, mangles, mangoes, mansion, meaning, melanin, mingles, mispage, misplan, moaning, nanogel, nominal, nongame, nonleap, nonmail, nonmale, nonmeal, nonsale, nonslip, opaline, opening, palming, pealing, pension, pigeons, pingles, pingoes, planing, plasmin, plasmon, pleions, sapling, saponin, sealing, sealion, seaming, semilog, seminal, sloping, soaping, spangle, spaniel, spongin