arpens rapens aprens parens rpaens praens arepns raepns aerpns earpns reapns erapns aperns paerns aeprns eaprns pearns eparns rpeans preans repans erpans perans eprans arpnes rapnes aprnes parnes rpanes pranes arnpes ranpes anrpes narpes rnapes nrapes apnres panres anpres napres pnares npares rpnaes prnaes rnpaes nrpaes pnraes npraes arenps raenps aernps earnps reanps eranps arneps raneps anreps nareps rnaeps nraeps aenrps eanrps anerps naerps enarps nearps renaps ernaps rneaps nreaps enraps neraps apenrs paenrs aepnrs eapnrs peanrs epanrs apners paners anpers napers pnaers npaers aenprs eanprs aneprs naeprs enaprs neaprs penars epnars pnears npears enpars nepars rpenas prenas repnas erpnas pernas eprnas rpneas prneas rnpeas nrpeas pnreas npreas renpas ernpas rnepas nrepas enrpas nerpas penras epnras pneras nperas enpras nepras arpesn rapesn apresn paresn rpaesn praesn arepsn raepsn aerpsn earpsn reapsn erapsn apersn paersn aeprsn eaprsn pearsn eparsn rpeasn preasn repasn erpasn perasn eprasn arpsen rapsen aprsen parsen rpasen prasen arspen raspen asrpen sarpen rsapen srapen apsren pasren aspren sapren psaren sparen rpsaen prsaen rspaen srpaen psraen spraen arespn raespn aerspn earspn reaspn eraspn arsepn rasepn asrepn sarepn rsaepn sraepn aesrpn easrpn aserpn saerpn esarpn searpn resapn ersapn rseapn sreapn esrapn serapn apesrn paesrn aepsrn eapsrn peasrn epasrn apsern pasern aspern sapern psaern spaern aesprn easprn aseprn saeprn esaprn seaprn pesarn epsarn psearn spearn esparn separn rpesan presan repsan erpsan persan eprsan rpsean prsean rspean srpean psrean sprean respan erspan rsepan srepan esrpan serpan pesran epsran pseran speran espran sepran arpnse rapnse aprnse parnse rpanse pranse arnpse ranpse anrpse narpse rnapse nrapse apnrse panrse anprse naprse pnarse nparse rpnase prnase rnpase nrpase pnrase nprase arpsne rapsne aprsne parsne rpasne prasne arspne raspne asrpne sarpne rsapne srapne apsrne pasrne asprne saprne psarne sparne rpsane prsane rspane srpane psrane sprane arnspe ranspe anrspe narspe rnaspe nraspe arsnpe rasnpe asrnpe sarnpe rsanpe sranpe ansrpe nasrpe asnrpe sanrpe nsarpe snarpe rnsape nrsape rsnape srnape nsrape snrape apnsre pansre anpsre napsre pnasre npasre apsnre pasnre aspnre sapnre psanre spanre anspre naspre asnpre sanpre nsapre snapre pnsare npsare psnare spnare nspare snpare rpnsae prnsae rnpsae nrpsae pnrsae nprsae rpsnae prsnae rspnae srpnae psrnae sprnae rnspae nrspae rsnpae srnpae nsrpae snrpae pnsrae npsrae psnrae spnrae nsprae snprae arensp raensp aernsp earnsp reansp eransp arnesp ranesp anresp naresp rnaesp nraesp aenrsp eanrsp anersp naersp enarsp nearsp renasp ernasp rneasp nreasp enrasp nerasp aresnp raesnp aersnp earsnp reasnp erasnp arsenp rasenp asrenp sarenp rsaenp sraenp aesrnp easrnp asernp saernp esarnp searnp resanp ersanp rseanp sreanp esranp seranp arnsep ransep anrsep narsep rnasep nrasep arsnep rasnep asrnep sarnep rsanep sranep ansrep nasrep asnrep sanrep nsarep snarep rnsaep nrsaep rsnaep srnaep nsraep snraep aensrp eansrp anesrp naesrp enasrp neasrp aesnrp easnrp asenrp saenrp esanrp seanrp anserp naserp asnerp sanerp nsaerp snaerp ensarp nesarp esnarp senarp nsearp snearp rensap ernsap rnesap nresap enrsap nersap resnap ersnap rsenap srenap esrnap sernap rnseap nrseap rsneap srneap nsreap snreap ensrap nesrap esnrap senrap nserap snerap apensr paensr aepnsr eapnsr peansr epansr apnesr panesr anpesr napesr pnaesr npaesr aenpsr eanpsr anepsr naepsr enapsr neapsr penasr epnasr pneasr npeasr enpasr nepasr apesnr paesnr aepsnr eapsnr peasnr epasnr apsenr pasenr aspenr sapenr psaenr spaenr aespnr easpnr asepnr saepnr esapnr seapnr pesanr epsanr pseanr speanr espanr sepanr apnser panser anpser napser pnaser npaser apsner pasner aspner sapner psaner spaner ansper nasper asnper sanper nsaper snaper pnsaer npsaer psnaer spnaer nspaer snpaer aenspr eanspr anespr naespr enaspr neaspr aesnpr easnpr asenpr saenpr esanpr seanpr ansepr nasepr asnepr sanepr nsaepr snaepr ensapr nesapr esnapr senapr nseapr sneapr pensar epnsar pnesar npesar enpsar nepsar pesnar epsnar psenar spenar espnar sepnar pnsear npsear psnear spnear nspear snpear enspar nespar esnpar senpar nsepar snepar rpensa prensa repnsa erpnsa pernsa eprnsa rpnesa prnesa rnpesa nrpesa pnresa npresa renpsa ernpsa rnepsa nrepsa enrpsa nerpsa penrsa epnrsa pnersa npersa enprsa neprsa rpesna presna repsna erpsna persna eprsna rpsena prsena rspena srpena psrena sprena respna erspna rsepna srepna esrpna serpna pesrna epsrna pserna sperna esprna seprna rpnsea prnsea rnpsea nrpsea pnrsea nprsea rpsnea prsnea rspnea srpnea psrnea sprnea rnspea nrspea rsnpea srnpea nsrpea snrpea pnsrea npsrea psnrea spnrea nsprea snprea renspa ernspa rnespa nrespa enrspa nerspa resnpa ersnpa rsenpa srenpa esrnpa sernpa rnsepa nrsepa rsnepa srnepa nsrepa snrepa ensrpa nesrpa esnrpa senrpa nserpa snerpa pensra epnsra pnesra npesra enpsra nepsra pesnra epsnra psenra spenra espnra sepnra pnsera npsera psnera spnera nspera snpera enspra nespra esnpra senpra nsepra snepra
Note: these 'words' (valid or invalid) are all the permutations of the word arpens. These words are obtained by scrambling the letters in arpens.