sopra ospra spora psora opsra posra sorpa osrpa sropa rsopa orspa rospa sproa psroa srpoa rspoa prsoa rpsoa oprsa porsa orpsa ropsa prosa rposa sopar ospar spoar psoar opsar posar soapr osapr saopr asopr oaspr aospr spaor psaor sapor aspor pasor apsor opasr poasr oapsr aopsr paosr aposr sorap osrap sroap rsoap orsap rosap soarp osarp saorp asorp oasrp aosrp sraop rsaop sarop asrop rasop arsop orasp roasp oarsp aorsp raosp arosp sprao psrao srpao rspao prsao rpsao sparo psaro sapro aspro pasro apsro srapo rsapo sarpo asrpo raspo arspo praso rpaso parso aprso rapso arpso opras poras orpas ropas proas rpoas opars poars oaprs aoprs paors apors oraps roaps oarps aorps raops arops praos rpaos paros apros rapos arpos
Note: these 'words' (valid or invalid) are all the permutations of the word sopra. These words are obtained by scrambling the letters in sopra.