runes urnes rnues nrues unres nures ruens urens reuns eruns uerns eurns rneus nreus renus ernus nerus enrus uners nuers uenrs eunrs neurs enurs runse urnse rnuse nruse unrse nurse rusne ursne rsune srune usrne surne rnsue nrsue rsnue srnue nsrue snrue unsre nusre usnre sunre nsure snure ruesn uresn reusn erusn uersn eursn rusen ursen rsuen sruen usren suren resun ersun rseun sreun esrun serun uesrn eusrn usern suern esurn seurn rnesu nresu rensu ernsu nersu enrsu rnseu nrseu rsneu srneu nsreu snreu resnu ersnu rsenu srenu esrnu sernu nesru ensru nseru sneru esnru senru unesr nuesr uensr eunsr neusr enusr unser nuser usner suner nsuer snuer uesnr eusnr usenr suenr esunr seunr nesur ensur nseur sneur esnur senur
Note: these 'words' (valid or invalid) are all the permutations of the word runes. These words are obtained by scrambling the letters in runes.