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