The word microeconomics is playable in Words With Friends™, but 1 blank substituting for the letter 'c' is 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: 26
Highest Scoring Words With Friends™ Plays In The Letters microeconomics
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Seven Letter Word Alert: (30 words)
cocoons, coiners, commons, concise, cornice, crimson, cronies, eosinic, erosion, iconism, incisor, incomer, incomes, ioniser, ionomer, irenics, ironies, meconic, memoirs, menisci, microns, mincers, miscoin, monomer, moronic, noisier, noisome, omicron, recoins, sericin