usable suable uasble ausble sauble asuble usbale subale ubsale busale sbuale bsuale uabsle aubsle ubasle buasle abusle bausle sabule asbule sbaule bsaule absule basule usalbe sualbe uaslbe auslbe saulbe asulbe uslabe sulabe ulsabe lusabe sluabe lsuabe ualsbe aulsbe ulasbe luasbe alusbe lausbe salube aslube slaube lsaube alsube lasube usblae sublae ubslae buslae sbulae bsulae uslbae sulbae ulsbae lusbae slubae lsubae ublsae bulsae ulbsae lubsae blusae lbusae sbluae bsluae slbuae lsbuae blsuae lbsuae uablse aublse ubalse bualse abulse baulse ualbse aulbse ulabse luabse alubse laubse ublase bulase ulbase lubase bluase lbuase abluse baluse albuse labuse blause lbause sablue asblue sbalue bsalue abslue baslue salbue aslbue slabue lsabue alsbue lasbue sblaue bslaue slbaue lsbaue blsaue lbsaue ablsue balsue albsue labsue blasue lbasue usabel suabel uasbel ausbel saubel asubel usbael subael ubsael busael sbuael bsuael uabsel aubsel ubasel buasel abusel bausel sabuel asbuel sbauel bsauel absuel basuel usaebl suaebl uasebl ausebl sauebl asuebl useabl sueabl uesabl eusabl seuabl esuabl uaesbl auesbl ueasbl euasbl aeusbl eausbl saeubl aseubl seaubl esaubl aesubl easubl usbeal subeal ubseal buseal sbueal bsueal usebal suebal uesbal eusbal seubal esubal ubesal buesal uebsal eubsal beusal ebusal sbeual bseual sebual esbual besual ebsual uabesl aubesl ubaesl buaesl abuesl bauesl uaebsl auebsl ueabsl euabsl aeubsl eaubsl ubeasl bueasl uebasl eubasl beuasl ebuasl abeusl baeusl aebusl eabusl beausl ebausl sabeul asbeul sbaeul bsaeul abseul baseul saebul asebul seabul esabul aesbul easbul sbeaul bseaul sebaul esbaul besaul ebsaul abesul baesul aebsul eabsul beasul ebasul usaleb sualeb uasleb ausleb sauleb asuleb uslaeb sulaeb ulsaeb lusaeb sluaeb lsuaeb ualseb aulseb ulaseb luaseb aluseb lauseb salueb aslueb slaueb lsaueb alsueb lasueb usaelb suaelb uaselb auselb sauelb asuelb usealb suealb uesalb eusalb seualb esualb uaeslb aueslb ueaslb euaslb aeuslb eauslb saeulb aseulb seaulb esaulb aesulb easulb usleab suleab ulseab luseab slueab lsueab uselab suelab ueslab euslab seulab esulab ulesab luesab uelsab eulsab leusab elusab sleuab lseuab seluab esluab lesuab elsuab ualesb aulesb ulaesb luaesb aluesb lauesb uaelsb auelsb uealsb eualsb aeulsb eaulsb uleasb lueasb uelasb eulasb leuasb eluasb aleusb laeusb aelusb ealusb leausb elausb saleub asleub slaeub lsaeub alseub laseub saelub aselub sealub esalub aeslub easlub sleaub lseaub selaub eslaub lesaub elsaub alesub laesub aelsub ealsub leasub elasub usblea sublea ubslea buslea sbulea bsulea uslbea sulbea ulsbea lusbea slubea lsubea ublsea bulsea ulbsea lubsea blusea lbusea sbluea bsluea slbuea lsbuea blsuea lbsuea usbela subela ubsela busela sbuela bsuela usebla suebla uesbla eusbla seubla esubla ubesla buesla uebsla eubsla beusla ebusla sbeula bseula sebula esbula besula ebsula usleba suleba ulseba luseba slueba lsueba uselba suelba ueslba euslba seulba esulba ulesba luesba uelsba eulsba leusba elusba sleuba lseuba seluba esluba lesuba elsuba ublesa bulesa ulbesa lubesa bluesa lbuesa ubelsa buelsa ueblsa eublsa beulsa ebulsa ulebsa luebsa uelbsa eulbsa leubsa elubsa bleusa lbeusa belusa eblusa lebusa elbusa sbleua bsleua slbeua lsbeua blseua lbseua sbelua bselua seblua esblua beslua ebslua slebua lsebua selbua eslbua lesbua elsbua blesua lbesua belsua eblsua lebsua elbsua uables aubles ubales buales abules baules ualbes aulbes ulabes luabes alubes laubes ublaes bulaes ulbaes lubaes bluaes lbuaes ablues balues albues labues blaues lbaues uabels aubels ubaels buaels abuels bauels uaebls auebls ueabls euabls aeubls eaubls ubeals bueals uebals eubals beuals ebuals abeuls baeuls aebuls eabuls beauls ebauls ualebs aulebs ulaebs luaebs aluebs lauebs uaelbs auelbs uealbs eualbs aeulbs eaulbs uleabs lueabs uelabs eulabs leuabs eluabs aleubs laeubs aelubs ealubs leaubs elaubs ubleas buleas ulbeas lubeas blueas lbueas ubelas buelas ueblas eublas beulas ebulas ulebas luebas uelbas eulbas leubas elubas bleuas lbeuas beluas ebluas lebuas elbuas ableus baleus albeus labeus blaeus lbaeus abelus baelus aeblus eablus bealus ebalus alebus laebus aelbus ealbus leabus elabus bleaus lbeaus belaus eblaus lebaus elbaus sableu asbleu sbaleu bsaleu absleu basleu salbeu aslbeu slabeu lsabeu alsbeu lasbeu sblaeu bslaeu slbaeu lsbaeu blsaeu lbsaeu ablseu balseu albseu labseu blaseu lbaseu sabelu asbelu sbaelu bsaelu abselu baselu saeblu aseblu seablu esablu aesblu easblu sbealu bsealu sebalu esbalu besalu ebsalu abeslu baeslu aebslu eabslu beaslu ebaslu salebu aslebu slaebu lsaebu alsebu lasebu saelbu aselbu sealbu esalbu aeslbu easlbu sleabu lseabu selabu eslabu lesabu elsabu alesbu laesbu aelsbu ealsbu leasbu elasbu sbleau bsleau slbeau lsbeau blseau lbseau sbelau bselau seblau esblau beslau ebslau slebau lsebau selbau eslbau lesbau elsbau blesau lbesau belsau eblsau lebsau elbsau ablesu balesu albesu labesu blaesu lbaesu abelsu baelsu aeblsu eablsu bealsu ebalsu alebsu laebsu aelbsu ealbsu leabsu elabsu bleasu lbeasu belasu eblasu lebasu elbasu
Note: these 'words' (valid or invalid) are all the permutations of the word usable. These words are obtained by scrambling the letters in usable.