After the national revival, the development of the Croatian language was influenced by rapid growth of the Croatian literary and scientific production of the second part of the 19th century. At that time, the terminology also gradually experienced its rise, and the formation of new words enriched the Croatian literary language. This is evidenced, for example, by the dictionaries of Bogoslav Šulek, Ivan Mažuranić, Josip Užarević and Dragutin Antun Parčić. That is why the topic of this doctoral thesis is The role of word formation in the Croatian language in the second half of the 19th century. The paper will present word formation on a synchronous level. The choice of the way the word formation analysis was performed will be explained at the beginning of the paper. The collected materials from the mentioned dictionaries will be approached descriptively and analytically with an emphasis on the formation analysis of selected new words, among which there is a large number of stylistically marked words. Based on the selected lexical material from the considered period, it will be analyzed to what extent the newly formed words came to life in the Croatian literary language, and how much did the word formation in Croatian language in the second half of the 19th century influence the modern Croatian language.