The word transaminase 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: 17
Highest Scoring Words With Friends™ Play In The Letters transaminase
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Seven Letter Word Alert: (64 words)
airmass, amanita, amastia, amentia, amnesia, amritas, anaemia, animate, antsier, artisan, artsman, artsmen, atresia, entrain, inmates, insaner, inseams, inserts, instars, interns, manners, mantras, marinas, marines, martens, martian, martins, masters, minaret, minters, misseat, misters, nastier, raiment, remains, remints, remnant, restain, retains, retinas, samaras, sariama, satires, searats, seastar, seitans, seminar, sestina, siennas, sinners, sinters, sirname, smarten, smartie, smiters, stainer, stamens, stamina, strains, streams, tanners, tinners, tsarina, tsarism