nebar enbar nbear bnear ebnar benar neabr enabr naebr anebr eanbr aenbr nbaer bnaer naber anber baner abner ebanr beanr eabnr aebnr baenr abenr nebra enbra nbera bnera ebnra benra nerba enrba nreba rneba ernba renba nbrea bnrea nrbea rnbea brnea rbnea ebrna berna erbna rebna brena rbena nearb enarb naerb anerb eanrb aenrb nerab enrab nreab rneab ernab renab nareb anreb nraeb rnaeb arneb raneb earnb aernb eranb reanb arenb raenb nbare bnare nabre anbre banre abnre nbrae bnrae nrbae rnbae brnae rbnae narbe anrbe nrabe rnabe arnbe ranbe barne abrne brane rbane arbne rabne ebarn bearn eabrn aebrn baern abern ebran beran erban reban brean rbean earbn aerbn erabn reabn arebn raebn baren abren braen rbaen arben raben
Note: these 'words' (valid or invalid) are all the permutations of the word nebar. These words are obtained by scrambling the letters in nebar.