We don't have synonyms for rebis yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are rebus, remis and resis.
(n) :
(alchemy, fiction) The end product of the alchemical magnum opus, a reunion of opposing qualities such as spirit and matter or male and female, represented by an androgynous being.
(n) :
(alchemy, fiction) The end product of the alchemical magnum opus, a reunion of opposing qualities such as spirit and matter or male and female, represented by an androgynous being.