The word microelectronic 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: 25
Highest Scoring Words With Friends™ Plays In The Letters microelectronic
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Seven Letter Word Alert: (70 words)
centric, circler, circlet, citrine, clement, coercer, colicin, colonic, colorer, cometic, conceit, concert, concoct, control, cornice, cornier, coroner, coronet, correct, coterie, crooner, eccrine, elector, emotion, enteric, enticer, erector, icecool, icteric, inciter, incomer, inerter, interim, ionomer, lectern, lection, licence, limiter, lintier, loonier, meconic, meiotic, mintier, miocene, miterer, monitor, monocle, moonlit, moronic, motlier, omicron, oncotic, onetime, oolitic, reciter, recline, reclone, recolor, reinter, remoter, retimer, retinol, roilier, roomier, telecom, telomer, termini, toolmen, tremolo, trireme