serais esrais sreais rseais ersais resais searis esaris saeris aseris easris aesris sraeis rsaeis sareis asreis raseis arseis erasis reasis earsis aersis raesis aresis serias esrias sreias rseias ersias resias seiras esiras sieras iseras eisras iesras srieas rsieas sireas isreas riseas irseas erisas reisas eirsas iersas riesas iresas seairs esairs saeirs aseirs easirs aesirs seiars esiars siears isears eisars iesars saiers asiers siaers isaers aisers iasers eaisrs aeisrs eiasrs ieasrs aiesrs iaesrs sraies rsaies saries asries rasies arsies sriaes rsiaes siraes israes risaes irsaes saires asires siares isares aisres iasres raises arises riases irases airses iarses eraiss reaiss eariss aeriss raeiss areiss eriass reiass eirass ierass rieass ireass eairss aeirss eiarss iearss aierss iaerss raiess ariess riaess iraess airess iaress serasi esrasi sreasi rseasi ersasi resasi searsi esarsi saersi asersi easrsi aesrsi sraesi rsaesi saresi asresi rasesi arsesi erassi reassi earssi aerssi raessi aressi sersai esrsai sresai rsesai erssai ressai sesrai essrai sserai sserai essrai sesrai srseai rsseai ssreai ssreai rsseai srseai erssai ressai esrsai sersai rsesai sresai seasri esasri saesri asesri eassri aessri sesari essari sseari sseari essari sesari saseri asseri ssaeri ssaeri asseri saseri eassri aessri esasri seasri asesri saesri srasei rsasei sarsei asrsei rassei arssei srsaei rssaei ssraei ssraei rssaei srsaei sasrei assrei ssarei ssarei assrei sasrei rassei arssei rsasei srasei asrsei sarsei erassi reassi earssi aerssi raessi aressi ersasi resasi esrasi serasi rseasi sreasi easrsi aesrsi esarsi searsi asersi saersi rasesi arsesi rsaesi sraesi asresi saresi serisa esrisa sreisa rseisa ersisa resisa seirsa esirsa siersa isersa eisrsa iesrsa sriesa rsiesa siresa isresa risesa irsesa erissa reissa eirssa ierssa riessa iressa sersia esrsia sresia rsesia erssia ressia sesria essria sseria sseria essria sesria srseia rsseia ssreia ssreia rsseia srseia erssia ressia esrsia sersia rsesia sresia seisra esisra siesra isesra eissra iessra sesira essira sseira sseira essira sesira sisera issera ssiera ssiera issera sisera eissra iessra esisra seisra isesra siesra srisea rsisea sirsea isrsea rissea irssea srsiea rssiea ssriea ssriea rssiea srsiea sisrea issrea ssirea ssirea issrea sisrea rissea irssea rsisea srisea isrsea sirsea erissa reissa eirssa ierssa riessa iressa ersisa resisa esrisa serisa rseisa sreisa eisrsa iesrsa esirsa seirsa isersa siersa risesa irsesa rsiesa sriesa isresa siresa seaisr esaisr saeisr aseisr easisr aesisr seiasr esiasr sieasr iseasr eisasr iesasr saiesr asiesr siaesr isaesr aisesr iasesr eaissr aeissr eiassr ieassr aiessr iaessr seasir esasir saesir asesir eassir aessir sesair essair sseair sseair essair sesair saseir asseir ssaeir ssaeir asseir saseir eassir aessir esasir seasir asesir saesir seisar esisar siesar isesar eissar iessar sesiar essiar sseiar sseiar essiar sesiar sisear issear ssiear ssiear issear sisear eissar iessar esisar seisar isesar siesar saiser asiser siaser isaser aisser iasser sasier assier ssaier ssaier assier sasier sisaer issaer ssiaer ssiaer issaer sisaer aisser iasser asiser saiser isaser siaser eaissr aeissr eiassr ieassr aiessr iaessr easisr aesisr esaisr seaisr aseisr saeisr eisasr iesasr esiasr seiasr iseasr sieasr aisesr iasesr asiesr saiesr isaesr siaesr sraise rsaise sarise asrise rasise arsise sriase rsiase sirase israse risase irsase sairse asirse siarse isarse aisrse iasrse raisse arisse riasse irasse airsse iarsse srasie rsasie sarsie asrsie rassie arssie srsaie rssaie ssraie ssraie rssaie srsaie sasrie assrie ssarie ssarie assrie sasrie rassie arssie rsasie srasie asrsie sarsie srisae rsisae sirsae isrsae rissae irssae srsiae rssiae ssriae ssriae rssiae srsiae sisrae issrae ssirae ssirae issrae sisrae rissae irssae rsisae srisae isrsae sirsae saisre asisre siasre isasre aissre iassre sasire assire ssaire ssaire assire sasire sisare issare ssiare ssiare issare sisare aissre iassre asisre saisre isasre siasre raisse arisse riasse irasse airsse iarsse rasise arsise rsaise sraise asrise sarise risase irsase rsiase sriase israse sirase aisrse iasrse asirse sairse isarse siarse eraiss reaiss eariss aeriss raeiss areiss eriass reiass eirass ierass rieass ireass eairss aeirss eiarss iearss aierss iaerss raiess ariess riaess iraess airess iaress erasis reasis earsis aersis raesis aresis ersais resais esrais serais rseais sreais easris aesris esaris searis aseris saeris raseis arseis rsaeis sraeis asreis sareis erisas reisas eirsas iersas riesas iresas ersias resias esrias serias rseias sreias eisras iesras esiras seiras iseras sieras riseas irseas rsieas srieas isreas sireas eaisrs aeisrs eiasrs ieasrs aiesrs iaesrs easirs aesirs esairs seairs aseirs saeirs eisars iesars esiars seiars isears siears aisers iasers asiers saiers isaers siaers raises arises riases irases airses iarses rasies arsies rsaies sraies asries saries risaes irsaes rsiaes sriaes israes siraes aisres iasres asires saires isares siares
Note: these 'words' (valid or invalid) are all the permutations of the word serais. These words are obtained by scrambling the letters in serais.