This paper aims to analyse and compare the usage patterns of two emotional adjectives of ‘기쁘다’ and ‘즐겁다’ through corpus analysis as a case study to find out differences among synonymous words. The focus of this analysis is on revealing syntagmatic similarity and difference in syntactical patterns rather than on describing semantic difference of the words. We adopt conjugation, syntagmatic relations, and structural patterns as an analytical framework by referring to previous studies. The analysis results show that the two words, ‘기쁘다’ and ‘즐겁다’, have different frequencies in inflectional forms, which are in turn found to have a variety of similarity and difference in their collocations and grammatical patterns. This analysis of syntactical pattern of two synonymous words will pave the way for a new approach to Korean vocabulary teaching and learning, and contribute to the Korean lexicography by providing reliable materials related to the case frame and structural pattern of words. (Yonsei University)