The word multiplexers 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: 28
Highest Scoring Words With Friends™ Play In The Letters multiplexers
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Seven Letter Word Alert: (88 words)
ellipse, empires, emptier, empties, epimers, epistle, exempts, experts, expires, expulse, extirps, impetus, impulse, leisure, limpest, limpets, lumpier, lustier, melters, metrise, millers, millets, misrule, mistell, mixture, mullers, mullets, mullite, mustier, pelites, pellets, pelters, perlite, permits, permute, petrels, plumier, prelims, premelt, premise, premixt, presell, presume, puerile, pullers, pullets, reemits, remelts, remixes, repiles, replies, reptile, repulse, resmelt, respell, respelt, respite, resplit, restump, retells, retiles, retills, retimes, rillets, rumples, rutiles, sextile, simpler, simplex, smeller, smelter, speller, spiller, spumier, sterile, stiller, stipule, stumper, supreme, tellers, tellies, tempers, temples, tillers, trellis, triples, umpires, uptimes