uncle nucle ucnle cunle ncule cnule unlce nulce ulnce lunce nluce lnuce uclne culne ulcne lucne clune lcune nclue cnlue nlcue lncue clnue lcnue uncel nucel ucnel cunel ncuel cnuel unecl nuecl uencl euncl neucl enucl ucenl cuenl uecnl eucnl ceunl ecunl nceul cneul necul encul cenul ecnul unlec nulec ulnec lunec nluec lnuec unelc nuelc uenlc eunlc neulc enulc ulenc luenc uelnc eulnc leunc elunc nleuc lneuc neluc enluc lenuc elnuc uclen culen ulcen lucen cluen lcuen uceln cueln uecln eucln ceuln eculn ulecn luecn uelcn eulcn leucn elucn cleun lceun celun eclun lecun elcun ncleu cnleu nlceu lnceu clneu lcneu ncelu cnelu neclu enclu cenlu ecnlu nlecu lnecu nelcu enlcu lencu elncu clenu lcenu celnu eclnu lecnu elcnu
Note: these 'words' (valid or invalid) are all the permutations of the word uncle. These words are obtained by scrambling the letters in uncle.