sward wsard sawrd aswrd wasrd awsrd swrad wsrad srwad rswad wrsad rwsad sarwd asrwd srawd rsawd arswd raswd warsd awrsd wrasd rwasd arwsd rawsd swadr wsadr sawdr aswdr wasdr awsdr swdar wsdar sdwar dswar wdsar dwsar sadwr asdwr sdawr dsawr adswr daswr wadsr awdsr wdasr dwasr adwsr dawsr swrda wsrda srwda rswda wrsda rwsda swdra wsdra sdwra dswra wdsra dwsra srdwa rsdwa sdrwa dsrwa rdswa drswa wrdsa rwdsa wdrsa dwrsa rdwsa drwsa sardw asrdw sradw rsadw arsdw rasdw sadrw asdrw sdarw dsarw adsrw dasrw srdaw rsdaw sdraw dsraw rdsaw drsaw ardsw radsw adrsw darsw rdasw drasw wards awrds wrads rwads arwds rawds wadrs awdrs wdars dwars adwrs dawrs wrdas rwdas wdras dwras rdwas drwas ardws radws adrws darws rdaws draws
Note: these 'words' (valid or invalid) are all the permutations of the word sward. These words are obtained by scrambling the letters in sward.