riprap irprap rpirap prirap iprrap pirrap rirpap irrpap rripap rripap irrpap rirpap rpriap prriap rrpiap rrpiap prriap rpriap iprrap pirrap irprap riprap prirap rpirap riparp irparp rpiarp priarp iprarp pirarp riaprp iraprp raiprp ariprp iarprp airprp rpairp prairp rapirp arpirp parirp aprirp iparrp piarrp iaprrp aiprrp pairrp apirrp rirapp irrapp rriapp rriapp irrapp rirapp riarpp irarpp rairpp arirpp iarrpp airrpp rraipp rraipp raripp arripp raripp arripp irarpp riarpp iarrpp airrpp rairpp arirpp rpraip prraip rrpaip rrpaip prraip rpraip rparip prarip raprip arprip parrip aprrip rrapip rrapip rarpip arrpip rarpip arrpip prarip rparip parrip aprrip raprip arprip iprarp pirarp irparp riparp priarp rpiarp iparrp piarrp iaprrp aiprrp pairrp apirrp iraprp riaprp iarprp airprp raiprp ariprp prairp rpairp parirp aprirp rapirp arpirp riprpa irprpa rpirpa prirpa iprrpa pirrpa rirppa irrppa rrippa rrippa irrppa rirppa rpripa prripa rrpipa rrpipa prripa rpripa iprrpa pirrpa irprpa riprpa prirpa rpirpa rippra irppra rpipra pripra iprpra pirpra rippra irppra rpipra pripra iprpra pirpra rppira prpira rppira prpira pprira pprira ipprra piprra ipprra piprra ppirra ppirra rirppa irrppa rrippa rrippa irrppa rirppa riprpa irprpa rpirpa prirpa iprrpa pirrpa rrpipa rrpipa rpripa prripa rpripa prripa irprpa riprpa iprrpa pirrpa rpirpa prirpa rprpia prrpia rrppia rrppia prrpia rprpia rppria prpria rppria prpria pprria pprria rrppia rrppia rprpia prrpia rprpia prrpia prpria rppria pprria pprria rppria prpria iprpra pirpra irppra rippra pripra rpipra ipprra piprra ipprra piprra ppirra ppirra irppra rippra iprpra pirpra rpipra pripra prpira rppira pprira pprira rppira prpira ripapr irpapr rpiapr priapr iprapr pirapr riappr irappr raippr arippr iarppr airppr rpaipr praipr rapipr arpipr paripr apripr iparpr piarpr iaprpr aiprpr pairpr apirpr rippar irppar rpipar pripar iprpar pirpar rippar irppar rpipar pripar iprpar pirpar rppiar prpiar rppiar prpiar ppriar ppriar ipprar piprar ipprar piprar ppirar ppirar riappr irappr raippr arippr iarppr airppr ripapr irpapr rpiapr priapr iprapr pirapr rapipr arpipr rpaipr praipr apripr paripr iaprpr aiprpr iparpr piarpr apirpr pairpr rpapir prapir rappir arppir parpir aprpir rppair prpair rppair prpair pprair pprair rappir arppir rpapir prapir aprpir parpir paprir apprir pparir pparir apprir paprir ipaprr piaprr iapprr aipprr paiprr apiprr ipparr piparr ipparr piparr ppiarr ppiarr iapprr aipprr ipaprr piaprr apiprr paiprr papirr appirr ppairr ppairr appirr papirr rirapp irrapp rriapp rriapp irrapp rirapp riarpp irarpp rairpp arirpp iarrpp airrpp rraipp rraipp raripp arripp raripp arripp irarpp riarpp iarrpp airrpp rairpp arirpp rirpap irrpap rripap rripap irrpap rirpap riprap irprap rpirap prirap iprrap pirrap rrpiap rrpiap rpriap prriap rpriap prriap irprap riprap iprrap pirrap rpirap prirap riaprp iraprp raiprp ariprp iarprp airprp riparp irparp rpiarp priarp iprarp pirarp rapirp arpirp rpairp prairp aprirp parirp iaprrp aiprrp iparrp piarrp apirrp pairrp rrapip rrapip rarpip arrpip rarpip arrpip rrpaip rrpaip rpraip prraip rpraip prraip raprip arprip rparip prarip aprrip parrip raprip arprip rparip prarip aprrip parrip iraprp riaprp iarprp airprp raiprp ariprp irparp riparp iprarp pirarp rpiarp priarp iaprrp aiprrp iparrp piarrp apirrp pairrp rapirp arpirp rpairp prairp aprirp parirp rprapi prrapi rrpapi rrpapi prrapi rprapi rparpi prarpi raprpi arprpi parrpi aprrpi rrappi rrappi rarppi arrppi rarppi arrppi prarpi rparpi parrpi aprrpi raprpi arprpi rprpai prrpai rrppai rrppai prrpai rprpai rpprai prprai rpprai prprai pprrai pprrai rrppai rrppai rprpai prrpai rprpai prrpai prprai rpprai pprrai pprrai rpprai prprai rpapri prapri rappri arppri parpri aprpri rppari prpari rppari prpari pprari pprari rappri arppri rpapri prapri aprpri parpri paprri apprri pparri pparri apprri paprri rrappi rrappi rarppi arrppi rarppi arrppi rrpapi rrpapi rprapi prrapi rprapi prrapi raprpi arprpi rparpi prarpi aprrpi parrpi raprpi arprpi rparpi prarpi aprrpi parrpi prapri rpapri parpri aprpri rappri arppri prpari rppari pprari pprari rppari prpari paprri apprri pparri pparri apprri paprri rappri arppri rpapri prapri aprpri parpri iprapr pirapr irpapr ripapr priapr rpiapr iparpr piarpr iaprpr aiprpr pairpr apirpr irappr riappr iarppr airppr raippr arippr praipr rpaipr paripr apripr rapipr arpipr iprpar pirpar irppar rippar pripar rpipar ipprar piprar ipprar piprar ppirar ppirar irppar rippar iprpar pirpar rpipar pripar prpiar rppiar ppriar ppriar rppiar prpiar ipaprr piaprr iapprr aipprr paiprr apiprr ipparr piparr ipparr piparr ppiarr ppiarr iapprr aipprr ipaprr piaprr apiprr paiprr papirr appirr ppairr ppairr appirr papirr irappr riappr iarppr airppr raippr arippr irpapr ripapr iprapr pirapr rpiapr priapr iaprpr aiprpr iparpr piarpr apirpr pairpr rapipr arpipr rpaipr praipr apripr paripr prapir rpapir parpir aprpir rappir arppir prpair rppair pprair pprair rppair prpair paprir apprir pparir pparir apprir paprir rappir arppir rpapir prapir aprpir parpir
Note: these 'words' (valid or invalid) are all the permutations of the word riprap. These words are obtained by scrambling the letters in riprap.