We don't have synonyms for stilus yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are stylus, stilts and stills.
(n) :
Alternative spelling of stylus. [(writing) An ancient writing implement consisting of a small rod with a pointed end for scratching letters on clay, wax-covered tablets or other surfaces, and a blunt end for obliterating them.]
(n) :
Alternative spelling of stylus. [(writing) An ancient writing implement consisting of a small rod with a pointed end for scratching letters on clay, wax-covered tablets or other surfaces, and a blunt end for obliterating them.]