arcus racus acrus carus rcaus craus arucs raucs aurcs uarcs ruacs uracs acurs caurs aucrs uacrs cuars ucars rcuas cruas rucas urcas curas ucras arcsu racsu acrsu carsu rcasu crasu arscu rascu asrcu sarcu rsacu sracu acsru casru ascru sacru csaru scaru rcsau crsau rscau srcau csrau scrau arusc rausc aursc uarsc ruasc urasc arsuc rasuc asruc saruc rsauc srauc ausrc uasrc asurc saurc usarc suarc rusac ursac rsuac sruac usrac surac acusr causr aucsr uacsr cuasr ucasr acsur casur ascur sacur csaur scaur auscr uascr asucr saucr usacr suacr cusar ucsar csuar scuar uscar sucar rcusa crusa rucsa urcsa cursa ucrsa rcsua crsua rscua srcua csrua scrua rusca ursca rsuca sruca usrca surca cusra ucsra csura scura uscra sucra
Note: these 'words' (valid or invalid) are all the permutations of the word arcus. These words are obtained by scrambling the letters in arcus.