ulnar lunar unlar nular lnuar nluar ulanr luanr ualnr aulnr launr alunr unalr nualr uanlr aunlr naulr anulr lnaur nlaur lanur alnur nalur anlur ulnra lunra unlra nulra lnura nlura ulrna lurna urlna rulna lruna rluna unrla nurla urnla runla nrula rnula lnrua nlrua lrnua rlnua nrlua rnlua ularn luarn ualrn aulrn laurn alurn ulran luran urlan rulan lruan rluan uarln aurln uraln rualn aruln rauln larun alrun lraun rlaun arlun ralun unarl nuarl uanrl aunrl naurl anurl unral nural urnal runal nrual rnual uarnl aurnl uranl ruanl arunl raunl narul anrul nraul rnaul arnul ranul lnaru nlaru lanru alnru nalru anlru lnrau nlrau lrnau rlnau nrlau rnlau larnu alrnu lranu rlanu arlnu ralnu narlu anrlu nralu rnalu arnlu ranlu
Note: these 'words' (valid or invalid) are all the permutations of the word ulnar. These words are obtained by scrambling the letters in ulnar.