The word refulgencies 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
Seven Letter Word Alert: (62 words)
censure, clinger, cringes, curling, cursing, elegies, elegise, engulfs, eugenic, feelers, feeling, feesing, feigner, felines, fencers, ferulic, figures, fingers, fleecer, fleeces, fleeing, flenser, freeing, fringes, fuelers, fueling, furling, generic, girnels, greisen, gunfire, infuser, leering, leisure, leucine, license, lingers, recline, recluse, reefing, reeling, refence, refiles, refines, reflies, refuels, refugee, refuges, reglues, reliefs, relines, reneges, renegue, reslice, reusing, rulings, silence, sincere, slinger, sluicer, surfing, unreels