One of the most difficult tasks in Russian language is synonyms. The synonyms can express the same idea of a word or a phrase from different angles. To master the usage of synonyms and exercise it proficiently will reflect the speaker's language ability. In the process of learning Russian, the learners have a problem to cope with the subtle distinctions of synonyms and always use them in a wrong way. The first part of this paper summarizes the concept and classifications of Russian synonyms. The second part - questionnaire analysis, which consists of ten groups of Russian synonyms, is also the main part of this paper. In conclusion, the results of the analyses and even some teaching advices will be presented in this paper.