The word recrudescing 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™ Play In The Letters
Seven Letter Word Alert: (71 words)
censure, cinders, cringed, cringer, cringes, cruised, cruiser, curried, curries, curring, cursing, decrier, decries, deicers, dengues, deniers, dernier, derries, desirer, discern, eccrine, educing, endures, ensured, ensurer, eugenic, genders, generic, girders, girners, greisen, grinder, gurners, inducer, induces, insured, insurer, nerdier, recured, recures, recurse, recused, redries, redrugs, reducer, reduces, regrind, reguide, reigned, reigner, reincur, renders, rerinse, rescind, rescued, rescuer, resider, residue, resurge, reurged, reurges, reusing, ringers, science, secured, securer, sedgier, seducer, seeding, sincere, succeed