aroth raoth aorth oarth roath orath artoh ratoh atroh taroh rtaoh traoh aotrh oatrh atorh taorh otarh toarh rotah ortah rtoah troah otrah torah aroht raoht aorht oarht roaht oraht arhot rahot ahrot harot rhaot hraot aohrt oahrt ahort haort ohart hoart rohat orhat rhoat hroat ohrat horat artho ratho atrho tarho rtaho traho arhto rahto ahrto harto rhato hrato athro tahro ahtro hatro tharo htaro rthao trhao rhtao hrtao thrao htrao aothr oathr atohr taohr otahr toahr aohtr oahtr ahotr haotr ohatr hoatr athor tahor ahtor hator thaor htaor othar tohar ohtar hotar thoar htoar rotha ortha rtoha troha otrha torha rohta orhta rhota hrota ohrta horta rthoa trhoa rhtoa hrtoa throa htroa othra tohra ohtra hotra thora htora
Note: these 'words' (valid or invalid) are all the permutations of the word aroth. These words are obtained by scrambling the letters in aroth.