The word duodecimals 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: 21
Highest Scoring Words With Friends™ Play In The Letters duodecimals
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Seven Letter Word Alert: (48 words)
adduces, caddies, caesium, camelid, celosia, claimed, clouded, coalise, coddles, cuddies, cuddles, decidua, decimal, declaim, desmoid, diadems, dildoes, dualise, dualism, emulsic, icedams, laddies, leucism, leucoma, macules, malices, medical, medusal, melodic, middles, miscode, miscued, misdeal, mislead, modules, moulded, mucoids, mucosae, mucosal, muddies, muddles, muscled, muscoid, musical, scalded, scolded, sluiced, solaced