The word molybdenites 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: 23
Highest Scoring Words With Friends™ Plays In The Letters molybdenites
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Seven Letter Word Alert: (94 words)
bedotes, bedtime, bendlet, benmost, bentley, beslime, betides, betimed, betimes, betoils, binodes, blondes, boldest, boletes, bolides, bonelet, boneset, boniest, bylined, bylines, debones, delimbs, delimes, delints, dements, demotes, denoise, denotes, densely, density, dentils, deslime, destine, destiny, disobey, distyle, dyeline, ebonies, edibles, eloined, endmost, enstyle, entombs, eomyids, etymons, eyebolt, eyelids, eyeslit, indoles, instyle, lemoned, lenited, lenites, linseed, lionets, medleys, mildest, mindset, misdone, mistold, mobiles, modesty, moisten, moistly, moneyed, moseyed, motleys, myeline, myelins, myeloid, needily, nestled, noblest, notedly, obesely, obesity, oilseed, oldtime, omelets, onetime, seedily, smelted, snidely, stonily, stylion, styloid, stymied, syenite, symbion, symbiot, syndome, tensely, tensile, yeelins