The study was aimed at providing more insights on the application of the corpus-based approach. The objectives of the study were to compare its learning effects with the conventional teaching method's effects on collocations of synonyms. The study was conducted with two groups of L2 learners. One group was randomly assigned to be the experimental group studying with the corpus-based approach whereas the other represented the comparison group studying with the conventional teaching method. The learners from both groups were matched in pairs according to their language proficiency and collocation knowledge on the pretest. During the study, the experimental group was trained through paper-based and hands-on activities to deal with the concordance information in the corpus whereas the comparison group was taught collocations of synonyms through conventional activities such as explicit teaching. The instruments for collecting data included the pretest, posttest, prewriting and postwriting.