upwaft puwaft uwpaft wupaft pwuaft wpuaft upawft puawft uapwft aupwft pauwft apuwft uwapft wuapft uawpft auwpft waupft awupft pwauft wpauft pawuft apwuft wapuft awpuft upwfat puwfat uwpfat wupfat pwufat wpufat upfwat pufwat ufpwat fupwat pfuwat fpuwat uwfpat wufpat ufwpat fuwpat wfupat fwupat pwfuat wpfuat pfwuat fpwuat wfpuat fwpuat upafwt puafwt uapfwt aupfwt paufwt apufwt upfawt pufawt ufpawt fupawt pfuawt fpuawt uafpwt aufpwt ufapwt fuapwt afupwt faupwt pafuwt apfuwt pfauwt fpauwt afpuwt fapuwt uwafpt wuafpt uawfpt auwfpt waufpt awufpt uwfapt wufapt ufwapt fuwapt wfuapt fwuapt uafwpt aufwpt ufawpt fuawpt afuwpt fauwpt wafupt awfupt wfaupt fwaupt afwupt fawupt pwafut wpafut pawfut apwfut wapfut awpfut pwfaut wpfaut pfwaut fpwaut wfpaut fwpaut pafwut apfwut pfawut fpawut afpwut fapwut wafput awfput wfaput fwaput afwput fawput upwatf puwatf uwpatf wupatf pwuatf wpuatf upawtf puawtf uapwtf aupwtf pauwtf apuwtf uwaptf wuaptf uawptf auwptf wauptf awuptf pwautf wpautf pawutf apwutf waputf awputf upwtaf puwtaf uwptaf wuptaf pwutaf wputaf uptwaf putwaf utpwaf tupwaf ptuwaf tpuwaf uwtpaf wutpaf utwpaf tuwpaf wtupaf twupaf pwtuaf wptuaf ptwuaf tpwuaf wtpuaf twpuaf upatwf puatwf uaptwf auptwf pautwf aputwf uptawf putawf utpawf tupawf ptuawf tpuawf uatpwf autpwf utapwf tuapwf atupwf taupwf patuwf aptuwf ptauwf tpauwf atpuwf tapuwf uwatpf wuatpf uawtpf auwtpf wautpf awutpf uwtapf wutapf utwapf tuwapf wtuapf twuapf uatwpf autwpf utawpf tuawpf atuwpf tauwpf watupf awtupf wtaupf twaupf atwupf tawupf pwatuf wpatuf pawtuf apwtuf waptuf awptuf pwtauf wptauf ptwauf tpwauf wtpauf twpauf patwuf aptwuf ptawuf tpawuf atpwuf tapwuf watpuf awtpuf wtapuf twapuf atwpuf tawpuf upwfta puwfta uwpfta wupfta pwufta wpufta upfwta pufwta ufpwta fupwta pfuwta fpuwta uwfpta wufpta ufwpta fuwpta wfupta fwupta pwfuta wpfuta pfwuta fpwuta wfputa fwputa upwtfa puwtfa uwptfa wuptfa pwutfa wputfa uptwfa putwfa utpwfa tupwfa ptuwfa tpuwfa uwtpfa wutpfa utwpfa tuwpfa wtupfa twupfa pwtufa wptufa ptwufa tpwufa wtpufa twpufa upftwa puftwa ufptwa fuptwa pfutwa fputwa uptfwa putfwa utpfwa tupfwa ptufwa tpufwa uftpwa futpwa utfpwa tufpwa ftupwa tfupwa pftuwa fptuwa ptfuwa tpfuwa ftpuwa tfpuwa uwftpa wuftpa ufwtpa fuwtpa wfutpa fwutpa uwtfpa wutfpa utwfpa tuwfpa wtufpa twufpa uftwpa futwpa utfwpa tufwpa ftuwpa tfuwpa wftupa fwtupa wtfupa twfupa ftwupa tfwupa pwftua wpftua pfwtua fpwtua wfptua fwptua pwtfua wptfua ptwfua tpwfua wtpfua twpfua pftwua fptwua ptfwua tpfwua ftpwua tfpwua wftpua fwtpua wtfpua twfpua ftwpua tfwpua upaftw puaftw uapftw aupftw pauftw apuftw upfatw pufatw ufpatw fupatw pfuatw fpuatw uafptw aufptw ufaptw fuaptw afuptw fauptw pafutw apfutw pfautw fpautw afputw faputw upatfw puatfw uaptfw auptfw pautfw aputfw uptafw putafw utpafw tupafw ptuafw tpuafw uatpfw autpfw utapfw tuapfw atupfw taupfw patufw aptufw ptaufw tpaufw atpufw tapufw upftaw puftaw ufptaw fuptaw pfutaw fputaw uptfaw putfaw utpfaw tupfaw ptufaw tpufaw uftpaw futpaw utfpaw tufpaw ftupaw tfupaw pftuaw fptuaw ptfuaw tpfuaw ftpuaw tfpuaw uaftpw auftpw ufatpw fuatpw afutpw fautpw uatfpw autfpw utafpw tuafpw atufpw taufpw uftapw futapw utfapw tufapw ftuapw tfuapw aftupw fatupw atfupw tafupw ftaupw tfaupw paftuw apftuw pfatuw fpatuw afptuw faptuw patfuw aptfuw ptafuw tpafuw atpfuw tapfuw pftauw fptauw ptfauw tpfauw ftpauw tfpauw aftpuw fatpuw atfpuw tafpuw ftapuw tfapuw uwaftp wuaftp uawftp auwftp wauftp awuftp uwfatp wufatp ufwatp fuwatp wfuatp fwuatp uafwtp aufwtp ufawtp fuawtp afuwtp fauwtp wafutp awfutp wfautp fwautp afwutp fawutp uwatfp wuatfp uawtfp auwtfp wautfp awutfp uwtafp wutafp utwafp tuwafp wtuafp twuafp uatwfp autwfp utawfp tuawfp atuwfp tauwfp watufp awtufp wtaufp twaufp atwufp tawufp uwftap wuftap ufwtap fuwtap wfutap fwutap uwtfap wutfap utwfap tuwfap wtufap twufap uftwap futwap utfwap tufwap ftuwap tfuwap wftuap fwtuap wtfuap twfuap ftwuap tfwuap uaftwp auftwp ufatwp fuatwp afutwp fautwp uatfwp autfwp utafwp tuafwp atufwp taufwp uftawp futawp utfawp tufawp ftuawp tfuawp aftuwp fatuwp atfuwp tafuwp ftauwp tfauwp waftup awftup wfatup fwatup afwtup fawtup watfup awtfup wtafup twafup atwfup tawfup wftaup fwtaup wtfaup twfaup ftwaup tfwaup aftwup fatwup atfwup tafwup ftawup tfawup pwaftu wpaftu pawftu apwftu wapftu awpftu pwfatu wpfatu pfwatu fpwatu wfpatu fwpatu pafwtu apfwtu pfawtu fpawtu afpwtu fapwtu wafptu awfptu wfaptu fwaptu afwptu fawptu pwatfu wpatfu pawtfu apwtfu waptfu awptfu pwtafu wptafu ptwafu tpwafu wtpafu twpafu patwfu aptwfu ptawfu tpawfu atpwfu tapwfu watpfu awtpfu wtapfu twapfu atwpfu tawpfu pwftau wpftau pfwtau fpwtau wfptau fwptau pwtfau wptfau ptwfau tpwfau wtpfau twpfau pftwau fptwau ptfwau tpfwau ftpwau tfpwau wftpau fwtpau wtfpau twfpau ftwpau tfwpau paftwu apftwu pfatwu fpatwu afptwu faptwu patfwu aptfwu ptafwu tpafwu atpfwu tapfwu pftawu fptawu ptfawu tpfawu ftpawu tfpawu aftpwu fatpwu atfpwu tafpwu ftapwu tfapwu waftpu awftpu wfatpu fwatpu afwtpu fawtpu watfpu awtfpu wtafpu twafpu atwfpu tawfpu wftapu fwtapu wtfapu twfapu ftwapu tfwapu aftwpu fatwpu atfwpu tafwpu ftawpu tfawpu
Note: these 'words' (valid or invalid) are all the permutations of the word upwaft. These words are obtained by scrambling the letters in upwaft.