rauns aruns ruans urans aurns uarns ranus arnus rnaus nraus anrus narus runas urnas rnuas nruas unras nuras aunrs uanrs anurs naurs unars nuars rausn arusn ruasn urasn aursn uarsn rasun arsun rsaun sraun asrun sarun rusan ursan rsuan sruan usran suran ausrn uasrn asurn saurn usarn suarn ransu arnsu rnasu nrasu anrsu narsu rasnu arsnu rsanu sranu asrnu sarnu rnsau nrsau rsnau srnau nsrau snrau ansru nasru asnru sanru nsaru snaru runsa urnsa rnusa nrusa unrsa nursa rusna ursna rsuna sruna usrna surna rnsua nrsua rsnua srnua nsrua snrua unsra nusra usnra sunra nsura snura aunsr uansr anusr nausr unasr nuasr ausnr uasnr asunr saunr usanr suanr ansur nasur asnur sanur nsaur snaur unsar nusar usnar sunar nsuar snuar
Note: these 'words' (valid or invalid) are all the permutations of the word rauns. These words are obtained by scrambling the letters in rauns.