ruins urins riuns iruns uirns iurns runis urnis rnuis nruis unris nuris rinus irnus rnius nrius inrus nirus uinrs iunrs unirs nuirs inurs niurs ruisn urisn riusn irusn uirsn iursn rusin ursin rsuin sruin usrin surin risun irsun rsiun sriun isrun sirun uisrn iusrn usirn suirn isurn siurn runsi urnsi rnusi nrusi unrsi nursi rusni ursni rsuni sruni usrni surni rnsui nrsui rsnui srnui nsrui snrui unsri nusri usnri sunri nsuri snuri rinsu irnsu rnisu nrisu inrsu nirsu risnu irsnu rsinu srinu isrnu sirnu rnsiu nrsiu rsniu srniu nsriu snriu insru nisru isnru sinru nsiru sniru uinsr iunsr unisr nuisr inusr niusr uisnr iusnr usinr suinr isunr siunr unsir nusir usnir sunir nsuir snuir insur nisur isnur sinur nsiur sniur
Note: these 'words' (valid or invalid) are all the permutations of the word ruins. These words are obtained by scrambling the letters in ruins.