The word peripherals 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: 20
Highest Scoring Words With Friends™ Play In The Letters peripherals
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Seven Letter Word Alert: (59 words)
applier, applies, apprise, aspirer, earlier, happier, harelip, harpers, harpies, healers, heapers, hearers, helpers, leapers, paperer, perhaps, phraser, plasher, pleaser, praiser, prepare, presale, rappels, rappers, raspier, realers, realise, reapers, rearise, reheaps, rehears, rehires, relapse, reliers, repairs, repaper, reparse, repeals, repiles, repipes, replier, replies, reprise, rerapes, reshape, reshare, respire, rippers, rippler, ripples, sappier, shalier, sharper, sharpie, shearer, shiplap, shipper, slipper, spearer