We don't have synonyms for corean yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are Korean, corban and crean.
(n) :
Archaic spelling of Korean. [(uncountable) Official language of the people residing on the Korean Peninsula, and language of approximately 60 million people, in Asia, North America, and elsewhere.]
(adj) :
Archaic spelling of Korean. [Of or relating to the Asian Peninsula comprising North Korea and South Korea.]
(n) :
Archaic spelling of Korean. [(uncountable) Official language of the people residing on the Korean Peninsula, and language of approximately 60 million people, in Asia, North America, and elsewhere.]
(adj) :
Archaic spelling of Korean. [Of or relating to the Asian Peninsula comprising North Korea and South Korea.]