shrubs hsrubs srhubs rshubs hrsubs rhsubs shurbs hsurbs suhrbs ushrbs husrbs uhsrbs sruhbs rsuhbs surhbs usrhbs rushbs urshbs hrusbs rhusbs hursbs uhrsbs ruhsbs urhsbs shrbus hsrbus srhbus rshbus hrsbus rhsbus shbrus hsbrus sbhrus bshrus hbsrus bhsrus srbhus rsbhus sbrhus bsrhus rbshus brshus hrbsus rhbsus hbrsus bhrsus rbhsus brhsus shubrs hsubrs suhbrs ushbrs husbrs uhsbrs shburs hsburs sbhurs bshurs hbsurs bhsurs subhrs usbhrs sbuhrs bsuhrs ubshrs bushrs hubsrs uhbsrs hbusrs bhusrs ubhsrs buhsrs srubhs rsubhs surbhs usrbhs rusbhs ursbhs srbuhs rsbuhs sbruhs bsruhs rbsuhs brsuhs subrhs usbrhs sburhs bsurhs ubsrhs busrhs rubshs urbshs rbushs brushs ubrshs burshs hrubss rhubss hurbss uhrbss ruhbss urhbss hrbuss rhbuss hbruss bhruss rbhuss brhuss hubrss uhbrss hburss bhurss ubhrss buhrss rubhss urbhss rbuhss bruhss ubrhss burhss shrusb hsrusb srhusb rshusb hrsusb rhsusb shursb hsursb suhrsb ushrsb husrsb uhsrsb sruhsb rsuhsb surhsb usrhsb rushsb urshsb hrussb rhussb hurssb uhrssb ruhssb urhssb shrsub hsrsub srhsub rshsub hrssub rhssub shsrub hssrub sshrub sshrub hssrub shsrub srshub rsshub ssrhub ssrhub rsshub srshub hrssub rhssub hsrsub shrsub rshsub srhsub shusrb hsusrb suhsrb ushsrb hussrb uhssrb shsurb hssurb sshurb sshurb hssurb shsurb sushrb usshrb ssuhrb ssuhrb usshrb sushrb hussrb uhssrb hsusrb shusrb ushsrb suhsrb srushb rsushb surshb usrshb russhb ursshb srsuhb rssuhb ssruhb ssruhb rssuhb srsuhb susrhb ussrhb ssurhb ssurhb ussrhb susrhb russhb ursshb rsushb srushb usrshb surshb hrussb rhussb hurssb uhrssb ruhssb urhssb hrsusb rhsusb hsrusb shrusb rshusb srhusb husrsb uhsrsb hsursb shursb ushrsb suhrsb rushsb urshsb rsuhsb sruhsb usrhsb surhsb shrbsu hsrbsu srhbsu rshbsu hrsbsu rhsbsu shbrsu hsbrsu sbhrsu bshrsu hbsrsu bhsrsu srbhsu rsbhsu sbrhsu bsrhsu rbshsu brshsu hrbssu rhbssu hbrssu bhrssu rbhssu brhssu shrsbu hsrsbu srhsbu rshsbu hrssbu rhssbu shsrbu hssrbu sshrbu sshrbu hssrbu shsrbu srshbu rsshbu ssrhbu ssrhbu rsshbu srshbu hrssbu rhssbu hsrsbu shrsbu rshsbu srhsbu shbsru hsbsru sbhsru bshsru hbssru bhssru shsbru hssbru sshbru sshbru hssbru shsbru sbshru bsshru ssbhru ssbhru bsshru sbshru hbssru bhssru hsbsru shbsru bshsru sbhsru srbshu rsbshu sbrshu bsrshu rbsshu brsshu srsbhu rssbhu ssrbhu ssrbhu rssbhu srsbhu sbsrhu bssrhu ssbrhu ssbrhu bssrhu sbsrhu rbsshu brsshu rsbshu srbshu bsrshu sbrshu hrbssu rhbssu hbrssu bhrssu rbhssu brhssu hrsbsu rhsbsu hsrbsu shrbsu rshbsu srhbsu hbsrsu bhsrsu hsbrsu shbrsu bshrsu sbhrsu rbshsu brshsu rsbhsu srbhsu bsrhsu sbrhsu shubsr hsubsr suhbsr ushbsr husbsr uhsbsr shbusr hsbusr sbhusr bshusr hbsusr bhsusr subhsr usbhsr sbuhsr bsuhsr ubshsr bushsr hubssr uhbssr hbussr bhussr ubhssr buhssr shusbr hsusbr suhsbr ushsbr hussbr uhssbr shsubr hssubr sshubr sshubr hssubr shsubr sushbr usshbr ssuhbr ssuhbr usshbr sushbr hussbr uhssbr hsusbr shusbr ushsbr suhsbr shbsur hsbsur sbhsur bshsur hbssur bhssur shsbur hssbur sshbur sshbur hssbur shsbur sbshur bsshur ssbhur ssbhur bsshur sbshur hbssur bhssur hsbsur shbsur bshsur sbhsur subshr usbshr sbushr bsushr ubsshr busshr susbhr ussbhr ssubhr ssubhr ussbhr susbhr sbsuhr bssuhr ssbuhr ssbuhr bssuhr sbsuhr ubsshr busshr usbshr subshr bsushr sbushr hubssr uhbssr hbussr bhussr ubhssr buhssr husbsr uhsbsr hsubsr shubsr ushbsr suhbsr hbsusr bhsusr hsbusr shbusr bshusr sbhusr ubshsr bushsr usbhsr subhsr bsuhsr sbuhsr srubsh rsubsh surbsh usrbsh rusbsh ursbsh srbush rsbush sbrush bsrush rbsush brsush subrsh usbrsh sbursh bsursh ubsrsh busrsh rubssh urbssh rbussh brussh ubrssh burssh srusbh rsusbh sursbh usrsbh russbh urssbh srsubh rssubh ssrubh ssrubh rssubh srsubh susrbh ussrbh ssurbh ssurbh ussrbh susrbh russbh urssbh rsusbh srusbh usrsbh sursbh srbsuh rsbsuh sbrsuh bsrsuh rbssuh brssuh srsbuh rssbuh ssrbuh ssrbuh rssbuh srsbuh sbsruh bssruh ssbruh ssbruh bssruh sbsruh rbssuh brssuh rsbsuh srbsuh bsrsuh sbrsuh subsrh usbsrh sbusrh bsusrh ubssrh bussrh susbrh ussbrh ssubrh ssubrh ussbrh susbrh sbsurh bssurh ssburh ssburh bssurh sbsurh ubssrh bussrh usbsrh subsrh bsusrh sbusrh rubssh urbssh rbussh brussh ubrssh burssh rusbsh ursbsh rsubsh srubsh usrbsh surbsh rbsush brsush rsbush srbush bsrush sbrush ubsrsh busrsh usbrsh subrsh bsursh sbursh hrubss rhubss hurbss uhrbss ruhbss urhbss hrbuss rhbuss hbruss bhruss rbhuss brhuss hubrss uhbrss hburss bhurss ubhrss buhrss rubhss urbhss rbuhss bruhss ubrhss burhss hrusbs rhusbs hursbs uhrsbs ruhsbs urhsbs hrsubs rhsubs hsrubs shrubs rshubs srhubs husrbs uhsrbs hsurbs shurbs ushrbs suhrbs rushbs urshbs rsuhbs sruhbs usrhbs surhbs hrbsus rhbsus hbrsus bhrsus rbhsus brhsus hrsbus rhsbus hsrbus shrbus rshbus srhbus hbsrus bhsrus hsbrus shbrus bshrus sbhrus rbshus brshus rsbhus srbhus bsrhus sbrhus hubsrs uhbsrs hbusrs bhusrs ubhsrs buhsrs husbrs uhsbrs hsubrs shubrs ushbrs suhbrs hbsurs bhsurs hsburs shburs bshurs sbhurs ubshrs bushrs usbhrs subhrs bsuhrs sbuhrs rubshs urbshs rbushs brushs ubrshs burshs rusbhs ursbhs rsubhs srubhs usrbhs surbhs rbsuhs brsuhs rsbuhs srbuhs bsruhs sbruhs ubsrhs busrhs usbrhs subrhs bsurhs sburhs
Note: these 'words' (valid or invalid) are all the permutations of the word shrubs. These words are obtained by scrambling the letters in shrubs.