The Korean Intellectual Property Office (KIPO) implemented a so called "similar search term function" on the Korean interface of the KIPRIS search system. Targeted mainly at domestic users, this tool makes Korean keyword searches a little easier also for non-native speakers.
Users still have to enter a Korean keyword whereupon the tool provides a list of possible search queries with synonyms in Korean and English according to different technical fields (IPC or CPC).
Further information available in the KIPRIS News section (in Korean only)
The EPO's Worldwide IP Team provides a detailed step by step search guide on how to access and use this tool in the "Searching in databases" section for Korea..