We don't have synonyms for cristal yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are crystal, crestal and crustal.
(n) :
Obsolete form of crystal. [(countable) A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.]
(n) :
Obsolete form of crystal. [(countable) A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.]