The word telescoping 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: 21
Highest Scoring Words With Friends™ Play In The Letters telescoping
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Seven Letter Word Alert: (75 words)
cenotes, clients, closing, coesite, cognise, congest, copings, copsing, costing, eclipse, elegist, elegits, elogies, elogist, eloigns, eloping, enclose, entices, epilogs, epistle, epsilon, genetic, gentile, gentles, glisten, gnostic, inspect, lection, legions, lenites, leptons, license, lingoes, lionets, longest, neglect, nepotic, notices, octenes, onestep, openest, pectens, pectins, pectose, peeling, pelites, pelting, pencils, penlite, pentose, peonies, petiole, pigeons, piglets, pingles, pingoes, pleions, poetics, poetise, polices, posting, poteens, scoping, section, seeping, silence, singlet, sloping, spiegel, splenic, stencil, telogen, tensile, tingles, topline