We don't have synonyms for schungite yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are shungite.
(n) :
Alternative form of shungite. [(mineralogy) A black, lustrous, non-crystalline mineraloid consisting mostly of carbon, used as a pigment in art and an antibacterial water treatment.]
(n) :
Alternative form of shungite. [(mineralogy) A black, lustrous, non-crystalline mineraloid consisting mostly of carbon, used as a pigment in art and an antibacterial water treatment.]