terns etrns trens rtens ertns retns tenrs etnrs tners nters entrs netrs trnes rtnes tnres ntres rntes nrtes ernts rents enrts nerts rnets nrets tersn etrsn tresn rtesn ertsn retsn tesrn etsrn tsern stern estrn setrn trsen rtsen tsren stren rsten srten erstn restn esrtn sertn rsetn sretn tensr etnsr tnesr ntesr entsr netsr tesnr etsnr tsenr stenr estnr setnr tnser ntser tsner stner nster snter enstr nestr esntr sentr nsetr snetr trnse rtnse tnrse ntrse rntse nrtse trsne rtsne tsrne strne rstne srtne tnsre ntsre tsnre stnre nstre sntre rnste nrste rsnte srnte nsrte snrte ernst renst enrst nerst rnest nrest ersnt resnt esrnt sernt rsent srent ensrt nesrt esnrt senrt nsert snert rnset nrset rsnet srnet nsret snret
Note: these 'words' (valid or invalid) are all the permutations of the word terns. These words are obtained by scrambling the letters in terns.