vigor ivgor vgior gvior igvor givor viogr ivogr voigr ovigr iovgr oivgr vgoir gvoir vogir ovgir govir ogvir igovr giovr iogvr oigvr goivr ogivr vigro ivgro vgiro gviro igvro givro virgo ivrgo vrigo rvigo irvgo rivgo vgrio gvrio vrgio rvgio grvio rgvio igrvo girvo irgvo rigvo grivo rgivo viorg ivorg voirg ovirg iovrg oivrg virog ivrog vriog rviog irvog rivog vorig ovrig vroig rvoig orvig rovig iorvg oirvg irovg riovg orivg roivg vgori gvori vogri ovgri govri ogvri vgroi gvroi vrgoi rvgoi grvoi rgvoi vorgi ovrgi vrogi rvogi orvgi rovgi gorvi ogrvi grovi rgovi orgvi rogvi igorv giorv iogrv oigrv goirv ogirv igrov girov irgov rigov griov rgiov iorgv oirgv irogv riogv origv roigv goriv ogriv groiv rgoiv orgiv rogiv
Note: these 'words' (valid or invalid) are all the permutations of the word vigor. These words are obtained by scrambling the letters in vigor.