ravin arvin rvain vrain avrin varin raivn arivn riavn iravn airvn iarvn rvian vrian rivan irvan viran ivran avirn vairn aivrn iavrn viarn ivarn ravni arvni rvani vrani avrni varni ranvi arnvi rnavi nravi anrvi narvi rvnai vrnai rnvai nrvai vnrai nvrai avnri vanri anvri navri vnari nvari rainv arinv rianv iranv airnv iarnv raniv arniv rnaiv nraiv anriv nariv rinav irnav rniav nriav inrav nirav ainrv ianrv anirv nairv inarv niarv rvina vrina rivna irvna virna ivrna rvnia vrnia rnvia nrvia vnria nvria rinva irnva rniva nriva inrva nirva vinra ivnra vnira nvira invra nivra avinr vainr aivnr iavnr vianr ivanr avnir vanir anvir navir vnair nvair ainvr ianvr anivr naivr inavr niavr vinar ivnar vniar nviar invar nivar
Note: these 'words' (valid or invalid) are all the permutations of the word ravin. These words are obtained by scrambling the letters in ravin.