rival irval rvial vrial ivral viral riavl iravl raivl arivl iarvl airvl rvail vrail ravil arvil varil avril ivarl viarl iavrl aivrl vairl avirl rivla irvla rvila vrila ivrla virla rilva irlva rliva lriva ilrva lirva rvlia vrlia rlvia lrvia vlria lvria ivlra vilra ilvra livra vlira lvira rialv iralv railv arilv iarlv airlv rilav irlav rliav lriav ilrav lirav raliv arliv rlaiv lraiv alriv lariv ialrv ailrv ilarv liarv alirv lairv rvali vrali ravli arvli varli avrli rvlai vrlai rlvai lrvai vlrai lvrai ralvi arlvi rlavi lravi alrvi larvi valri avlri vlari lvari alvri lavri ivalr vialr iavlr aivlr vailr avilr ivlar vilar ilvar livar vliar lviar ialvr ailvr ilavr liavr alivr laivr valir avlir vlair lvair alvir lavir
Note: these 'words' (valid or invalid) are all the permutations of the word rival. These words are obtained by scrambling the letters in rival.