The word milliammeters is playable in Words With Friends™, but 1 blank substituting for the letter 'm' 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: 20
Highest Scoring Words With Friends™ Plays In The Letters milliammeters
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Seven Letter Word Alert: (85 words)
aeriest, airiest, airtime, alltime, ammeter, armlets, elaters, elitism, emirate, illites, immerse, irisate, itemise, limelit, limiter, literal, mailers, maimers, mallets, maltier, marlite, marmite, mealier, meatier, melters, metamer, metrise, militar, millers, millets, mismate, mistell, mistier, mistime, mistral, rallies, realest, realise, realism, realist, reemits, relates, remails, remates, remelts, resmelt, retails, reteams, retells, retiles, retills, retimes, rillets, saltier, seamier, seriate, seriema, sillier, siltier, similar, siriema, slammer, slatier, slimier, slimmer, smaller, smartie, smeller, smelter, smilier, stammer, stealer, steamer, stellar, sterile, stiller, tallier, tallies, tellers, tellies, tillers, tramell, tramels, trammel, trellis