iambus aimbus imabus miabus amibus maibus iabmus aibmus ibamus biamus abimus baimus imbaus mibaus ibmaus bimaus mbiaus bmiaus ambius mabius abmius bamius mbaius bmaius iamubs aimubs imaubs miaubs amiubs maiubs iaumbs aiumbs iuambs uiambs auimbs uaimbs imuabs miuabs iumabs uimabs muiabs umiabs amuibs mauibs aumibs uamibs muaibs umaibs iabums aibums ibaums biaums abiums baiums iaubms aiubms iuabms uiabms auibms uaibms ibuams biuams iubams uibams buiams ubiams abuims bauims aubims uabims buaims ubaims imbuas mibuas ibmuas bimuas mbiuas bmiuas imubas miubas iumbas uimbas muibas umibas ibumas biumas iubmas uibmas buimas ubimas mbuias bmuias mubias umbias bumias ubmias ambuis mabuis abmuis bamuis mbauis bmauis amubis maubis aumbis uambis muabis umabis abumis baumis aubmis uabmis buamis ubamis mbuais bmuais mubais umbais bumais ubmais iambsu aimbsu imabsu miabsu amibsu maibsu iabmsu aibmsu ibamsu biamsu abimsu baimsu imbasu mibasu ibmasu bimasu mbiasu bmiasu ambisu mabisu abmisu bamisu mbaisu bmaisu iamsbu aimsbu imasbu miasbu amisbu maisbu iasmbu aismbu isambu siambu asimbu saimbu imsabu misabu ismabu simabu msiabu smiabu amsibu masibu asmibu samibu msaibu smaibu iabsmu aibsmu ibasmu biasmu abismu baismu iasbmu aisbmu isabmu siabmu asibmu saibmu ibsamu bisamu isbamu sibamu bsiamu sbiamu absimu basimu asbimu sabimu bsaimu sbaimu imbsau mibsau ibmsau bimsau mbisau bmisau imsbau misbau ismbau simbau msibau smibau ibsmau bismau isbmau sibmau bsimau sbimau mbsiau bmsiau msbiau smbiau bsmiau sbmiau ambsiu mabsiu abmsiu bamsiu mbasiu bmasiu amsbiu masbiu asmbiu sambiu msabiu smabiu absmiu basmiu asbmiu sabmiu bsamiu sbamiu mbsaiu bmsaiu msbaiu smbaiu bsmaiu sbmaiu iamusb aimusb imausb miausb amiusb maiusb iaumsb aiumsb iuamsb uiamsb auimsb uaimsb imuasb miuasb iumasb uimasb muiasb umiasb amuisb mauisb aumisb uamisb muaisb umaisb iamsub aimsub imasub miasub amisub maisub iasmub aismub isamub siamub asimub saimub imsaub misaub ismaub simaub msiaub smiaub amsiub masiub asmiub samiub msaiub smaiub iausmb aiusmb iuasmb uiasmb auismb uaismb iasumb aisumb isaumb siaumb asiumb saiumb iusamb uisamb isuamb siuamb usiamb suiamb ausimb uasimb asuimb sauimb usaimb suaimb imusab miusab iumsab uimsab muisab umisab imsuab misuab ismuab simuab msiuab smiuab iusmab uismab isumab siumab usimab suimab musiab umsiab msuiab smuiab usmiab sumiab amusib mausib aumsib uamsib muasib umasib amsuib masuib asmuib samuib msauib smauib ausmib uasmib asumib saumib usamib suamib musaib umsaib msuaib smuaib usmaib sumaib iabusm aibusm ibausm biausm abiusm baiusm iaubsm aiubsm iuabsm uiabsm auibsm uaibsm ibuasm biuasm iubasm uibasm buiasm ubiasm abuism bauism aubism uabism buaism ubaism iabsum aibsum ibasum biasum abisum baisum iasbum aisbum isabum siabum asibum saibum ibsaum bisaum isbaum sibaum bsiaum sbiaum absium basium asbium sabium bsaium sbaium iausbm aiusbm iuasbm uiasbm auisbm uaisbm iasubm aisubm isaubm siaubm asiubm saiubm iusabm uisabm isuabm siuabm usiabm suiabm ausibm uasibm asuibm sauibm usaibm suaibm ibusam biusam iubsam uibsam buisam ubisam ibsuam bisuam isbuam sibuam bsiuam sbiuam iusbam uisbam isubam siubam usibam suibam busiam ubsiam bsuiam sbuiam usbiam subiam abusim bausim aubsim uabsim buasim ubasim absuim basuim asbuim sabuim bsauim sbauim ausbim uasbim asubim saubim usabim suabim busaim ubsaim bsuaim sbuaim usbaim subaim imbusa mibusa ibmusa bimusa mbiusa bmiusa imubsa miubsa iumbsa uimbsa muibsa umibsa ibumsa biumsa iubmsa uibmsa buimsa ubimsa mbuisa bmuisa mubisa umbisa bumisa ubmisa imbsua mibsua ibmsua bimsua mbisua bmisua imsbua misbua ismbua simbua msibua smibua ibsmua bismua isbmua sibmua bsimua sbimua mbsiua bmsiua msbiua smbiua bsmiua sbmiua imusba miusba iumsba uimsba muisba umisba imsuba misuba ismuba simuba msiuba smiuba iusmba uismba isumba siumba usimba suimba musiba umsiba msuiba smuiba usmiba sumiba ibusma biusma iubsma uibsma buisma ubisma ibsuma bisuma isbuma sibuma bsiuma sbiuma iusbma uisbma isubma siubma usibma suibma busima ubsima bsuima sbuima usbima subima mbusia bmusia mubsia umbsia bumsia ubmsia mbsuia bmsuia msbuia smbuia bsmuia sbmuia musbia umsbia msubia smubia usmbia sumbia busmia ubsmia bsumia sbumia usbmia submia ambusi mabusi abmusi bamusi mbausi bmausi amubsi maubsi aumbsi uambsi muabsi umabsi abumsi baumsi aubmsi uabmsi buamsi ubamsi mbuasi bmuasi mubasi umbasi bumasi ubmasi ambsui mabsui abmsui bamsui mbasui bmasui amsbui masbui asmbui sambui msabui smabui absmui basmui asbmui sabmui bsamui sbamui mbsaui bmsaui msbaui smbaui bsmaui sbmaui amusbi mausbi aumsbi uamsbi muasbi umasbi amsubi masubi asmubi samubi msaubi smaubi ausmbi uasmbi asumbi saumbi usambi suambi musabi umsabi msuabi smuabi usmabi sumabi abusmi bausmi aubsmi uabsmi buasmi ubasmi absumi basumi asbumi sabumi bsaumi sbaumi ausbmi uasbmi asubmi saubmi usabmi suabmi busami ubsami bsuami sbuami usbami subami mbusai bmusai mubsai umbsai bumsai ubmsai mbsuai bmsuai msbuai smbuai bsmuai sbmuai musbai umsbai msubai smubai usmbai sumbai busmai ubsmai bsumai sbumai usbmai submai
Note: these 'words' (valid or invalid) are all the permutations of the word iambus. These words are obtained by scrambling the letters in iambus.