crests rcests cersts ecrsts recsts ercsts crsets rcsets csrets screts rscets srcets cesrts ecsrts cserts scerts escrts secrts rescts erscts rsects srects esrcts sercts cretss rcetss certss ecrtss rectss erctss crtess rctess ctress tcress rtcess trcess cetrss ectrss cterss tcerss etcrss tecrss retcss ertcss rtecss trecss etrcss tercss crstes rcstes csrtes scrtes rsctes srctes crtses rctses ctrses tcrses rtcses trcses cstres sctres ctsres tcsres stcres tscres rstces srtces rtsces trsces strces tsrces cestrs ecstrs csetrs scetrs esctrs sectrs cetsrs ectsrs ctesrs tcesrs etcsrs tecsrs csters scters ctsers tcsers stcers tscers estcrs setcrs etscrs tescrs stecrs tsecrs restcs erstcs rsetcs sretcs esrtcs sertcs retscs ertscs rtescs trescs etrscs terscs rstecs srtecs rtsecs trsecs strecs tsrecs estrcs setrcs etsrcs tesrcs stercs tsercs cresst rcesst cersst ecrsst recsst ercsst crsest rcsest csrest screst rscest srcest cesrst ecsrst cserst scerst escrst secrst rescst erscst rsecst srecst esrcst sercst cresst rcesst cersst ecrsst recsst ercsst crsest rcsest csrest screst rscest srcest cesrst ecsrst cserst scerst escrst secrst rescst erscst rsecst srecst esrcst sercst crsset rcsset csrset scrset rscset srcset crsset rcsset csrset scrset rscset srcset cssret scsret cssret scsret sscret sscret rsscet srscet rsscet srscet ssrcet ssrcet cessrt ecssrt csesrt scesrt escsrt secsrt cessrt ecssrt csesrt scesrt escsrt secsrt cssert scsert cssert scsert sscert sscert esscrt sescrt esscrt sescrt ssecrt ssecrt ressct erssct rsesct sresct esrsct sersct ressct erssct rsesct sresct esrsct sersct rssect srsect rssect srsect ssrect ssrect essrct sesrct essrct sesrct sserct sserct cretss rcetss certss ecrtss rectss erctss crtess rctess ctress tcress rtcess trcess cetrss ectrss cterss tcerss etcrss tecrss retcss ertcss rtecss trecss etrcss tercss crests rcests cersts ecrsts recsts ercsts crsets rcsets csrets screts rscets srcets cesrts ecsrts cserts scerts escrts secrts rescts erscts rsects srects esrcts sercts crtses rctses ctrses tcrses rtcses trcses crstes rcstes csrtes scrtes rsctes srctes ctsres tcsres cstres sctres tscres stcres rtsces trsces rstces srtces tsrces strces cetsrs ectsrs ctesrs tcesrs etcsrs tecsrs cestrs ecstrs csetrs scetrs esctrs sectrs ctsers tcsers csters scters tscers stcers etscrs tescrs estcrs setcrs tsecrs stecrs retscs ertscs rtescs trescs etrscs terscs restcs erstcs rsetcs sretcs esrtcs sertcs rtsecs trsecs rstecs srtecs tsrecs strecs etsrcs tesrcs estrcs setrcs tsercs stercs crstse rcstse csrtse scrtse rsctse srctse crtsse rctsse ctrsse tcrsse rtcsse trcsse cstrse sctrse ctsrse tcsrse stcrse tscrse rstcse srtcse rtscse trscse strcse tsrcse crsste rcsste csrste scrste rscste srcste crsste rcsste csrste scrste rscste srcste cssrte scsrte cssrte scsrte sscrte sscrte rsscte srscte rsscte srscte ssrcte ssrcte crtsse rctsse ctrsse tcrsse rtcsse trcsse crstse rcstse csrtse scrtse rsctse srctse ctsrse tcsrse cstrse sctrse tscrse stcrse rtscse trscse rstcse srtcse tsrcse strcse cstsre sctsre ctssre tcssre stcsre tscsre csstre scstre csstre scstre ssctre ssctre ctssre tcssre cstsre sctsre tscsre stcsre stscre tsscre sstcre sstcre tsscre stscre rstsce srtsce rtssce trssce strsce tsrsce rsstce srstce rsstce srstce ssrtce ssrtce rtssce trssce rstsce srtsce tsrsce strsce stsrce tssrce sstrce sstrce tssrce stsrce cestsr ecstsr csetsr scetsr esctsr sectsr cetssr ectssr ctessr tcessr etcssr tecssr cstesr sctesr ctsesr tcsesr stcesr tscesr estcsr setcsr etscsr tescsr stecsr tsecsr cesstr ecsstr csestr scestr escstr secstr cesstr ecsstr csestr scestr escstr secstr cssetr scsetr cssetr scsetr sscetr sscetr essctr sesctr essctr sesctr ssectr ssectr cetssr ectssr ctessr tcessr etcssr tecssr cestsr ecstsr csetsr scetsr esctsr sectsr ctsesr tcsesr cstesr sctesr tscesr stcesr etscsr tescsr estcsr setcsr tsecsr stecsr cstser sctser ctsser tcsser stcser tscser csster scster csster scster sscter sscter ctsser tcsser cstser sctser tscser stcser stscer tsscer sstcer sstcer tsscer stscer estscr setscr etsscr tesscr stescr tsescr esstcr sestcr esstcr sestcr ssetcr ssetcr etsscr tesscr estscr setscr tsescr stescr stsecr tssecr sstecr sstecr tssecr stsecr restsc erstsc rsetsc sretsc esrtsc sertsc retssc ertssc rtessc tressc etrssc terssc rstesc srtesc rtsesc trsesc stresc tsresc estrsc setrsc etsrsc tesrsc stersc tsersc resstc ersstc rsestc srestc esrstc serstc resstc ersstc rsestc srestc esrstc serstc rssetc srsetc rssetc srsetc ssretc ssretc essrtc sesrtc essrtc sesrtc ssertc ssertc retssc ertssc rtessc tressc etrssc terssc restsc erstsc rsetsc sretsc esrtsc sertsc rtsesc trsesc rstesc srtesc tsresc stresc etsrsc tesrsc estrsc setrsc tsersc stersc rstsec srtsec rtssec trssec strsec tsrsec rsstec srstec rsstec srstec ssrtec ssrtec rtssec trssec rstsec srtsec tsrsec strsec stsrec tssrec sstrec sstrec tssrec stsrec estsrc setsrc etssrc tessrc stesrc tsesrc esstrc sestrc esstrc sestrc ssetrc ssetrc etssrc tessrc estsrc setsrc tsesrc stesrc stserc tsserc ssterc ssterc tsserc stserc
Note: these 'words' (valid or invalid) are all the permutations of the word crests. These words are obtained by scrambling the letters in crests.