Introduction: at present the oldest and most productive way of word formation - stem-composition in agglutinative languages - lies in the basis of the processes of formation of the grammatical system. Therefore, the study of new words, created in this way, is a relevant topic. It is especially important to pay attention to historical and comparative stem-composition, which can serve as a good basis for expanding theoretical knowledge and activation of typological research in word formation. Objective: based on the methods of statistical analysis. to identify common and different features in the ways of formation of compound nouns based on the subordinate connection in the Erzya and Hungarian languages. Research materials: bilingual dictionaries: Erzya-Russian (edited by B. A. Serebrennikov, R. N. Buzakova, M. V. Mosin) and Hungarian-Russian by L. Galdi and P. Uzonyi. Results and novelty of the research: in the Erzya and Hungarian languages, the formation of compound nouns on the basis of a subordinate connection is a productive way of word formation. Detenninatives (or composites) are formed by attaching the main form of a defining noun to a defined noun. They are classified according to belonging of the first component to a part of speech. The largest group is compound words with the first noun component. It is productive to use an adjective as the first component of the name. A group of words, where the first component is a participle, an adverb, or a numeral name is small. In the Erzya language. there are few compound nouns consisting of three components, whereas in the Hungarian language it is a large group. In the process of word formation, morphological changes can be observed. The scientific novelty of the research is the detailed analysis of compound nouns based on the base of a subordinate connection in the Erzya and Hungarian languages on the material of dictionaries: Erzyan-ruzon yolks = Erzya-Russian dictionary, Magyar-orosz szotar = Hungarian-Russian dictionary.
