1 (wiktionary) 2 (vi.wikipedia) 3 (en.wikipedia) 4 (glosbe)

Core Words Familarize yourself with the 'core words'.
Compounds Expand your vocabulary by studying more complex words built by the 'core words'.
Wordsense Learn about the wordsenses of the english term.

KOREAN 3.0	Eng	Wordtype	Etym.	Gb	Vie
☆☆	MEASURE; ACTION	Noun	对策	对策	đối sách, biện pháp đối phó
☆	ALTERNATIVE; SOLUTION; MEASURE	Noun	对案	对策，方案	đề án, kế hoạch