The word prosthetics 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: 19
Highest Scoring Words With Friends™ Plays In The Letters prosthetics
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Seven Letter Word Alert: (72 words)
cesspit, chipset, ciphers, cithers, coheirs, copiers, corpses, corsets, cosiest, cotters, erotics, escorts, heroics, hitters, hosiers, hospice, oecists, ostrich, persist, pettish, pitcher, pitches, poetics, porches, posters, pothers, potiche, potters, potties, priests, process, protect, protest, protist, repitch, reposts, reships, respots, rhotics, richest, ropiest, rosehip, rosiest, scripts, sectors, septics, shitpot, sitters, sorties, spheric, spicers, spotter, spriest, sprites, stories, stretch, stripes, strophe, theists, thirsts, thorite, tipster, tiptoer, tiptoes, tithers, torches, triceps, tricots, trisect, trophic, tropics, tropist