We don't have synonyms for sinoxenic yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are linolenic and monoxenic.
(adj) :
Alternative spelling of Sino-Xenic. [(linguistics) Related to pronunciations for reading Chinese in Japan, Korea and Vietnam, originating in medieval times and the source of large-scale borrowings of Chinese words into Japonic, Koreanic and Vietnamese languages, none of which are genetically related to Chinese (excluding Sinitic topolects).]
(adj) :
Alternative spelling of Sino-Xenic. [(linguistics) Related to pronunciations for reading Chinese in Japan, Korea and Vietnam, originating in medieval times and the source of large-scale borrowings of Chinese words into Japonic, Koreanic and Vietnamese languages, none of which are genetically related to Chinese (excluding Sinitic topolects).]