The word amelogenesis 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: 19
Highest Scoring Words With Friends™ Plays In The Letters amelogenesis
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Seven Letter Word Alert: (69 words)
ageless, agonies, agonise, agonism, aimless, animose, egoisms, egoless, elegies, elegise, elogies, eloigns, enamels, enemies, enigmas, enolase, enseals, geminal, gemless, geneses, genesis, genials, genomes, gliomas, glioses, gmelina, goalies, imagoes, inseams, insoles, leasing, legions, lesions, ligases, lineage, lingoes, lioness, losings, maligns, mangles, mangoes, manless, massing, meanies, measles, meioses, melange, menages, message, messing, mileage, mingles, mossing, nemesis, salines, salmons, sealing, sealion, seaming, seeming, semilog, seminal, siamese, siemens, signals, signees, silanes, singles, slogans