The word transmittals 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 transmittals
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Seven Letter Word Alert: (37 words)
airmass, amritas, animals, artisan, artists, artsman, attains, attrist, instars, laminar, laminas, lariats, mantras, marinas, marital, marlins, martial, martian, martins, mistral, rattail, salamis, stamina, starlit, statins, statism, statist, strains, straint, straits, stratas, tarsals, tartans, transit, tsarina, tsarism, tsarist