nadir andir ndair dnair adnir danir naidr anidr niadr inadr aindr iandr ndiar dniar nidar indar dinar idnar adinr dainr aidnr iadnr dianr idanr nadri andri ndari dnari adnri danri nardi anrdi nradi rnadi arndi randi ndrai dnrai nrdai rndai drnai rdnai adrni darni ardni radni drani rdani naird anird niard inard ainrd ianrd narid anrid nraid rnaid arnid ranid nirad inrad nriad rniad irnad rinad airnd iarnd arind raind irand riand ndira dnira nidra indra dinra idnra ndria dnria nrdia rndia drnia rdnia nirda inrda nrida rnida irnda rinda dirna idrna drina rdina irdna ridna adirn dairn aidrn iadrn diarn idarn adrin darin ardin radin drain rdain airdn iardn aridn raidn iradn riadn diran idran drian rdian irdan ridan
Note: these 'words' (valid or invalid) are all the permutations of the word nadir. These words are obtained by scrambling the letters in nadir.