The word photoelectric 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: 25
Highest Scoring Words With Friends™ Play In The Letters photoelectric
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Seven Letter Word Alert: (53 words)
cheerio, choicer, choleic, chortle, circlet, clitter, clotter, copilot, coterie, crochet, ectopic, elector, epithet, etheric, heretic, hoplite, icecool, loopier, otolite, otolith, perlite, petiole, pettier, philter, philtre, piccolo, pitcher, plotter, politer, porotic, portico, portlet, pothole, potiche, precool, prelect, prootic, protect, receipt, repilot, repitch, reptile, retitle, rootlet, thereto, thorite, tiptoer, tootler, treetop, triplet, tripole, trochee, trophic