Abstract
This article examines the main part of root substantive nouns. They are generally not separated from their accusative pronouns, and they are used both in the original accusative form and also in the independent pronominal form that were formed later. Such substantive nouns, the meaning of which has reached the level of materialization are usually found in literary works. The degree of substantivization of adjectives and pronouns is generally not the same. Even one adjective word class itself has a different level of acquiring such a material character. Among such types of nouns, there are those that have generally reached the rank of a registered word through substantivization, as well as those that have not yet reached the rank of a registered word, those that are contextual (stylistic) and occasional. The task of the article is to study whether substantive nouns, like simple nouns, can be described in three forms: root, derivative and complex. The scientific significance of this paper is the need for analysis in determining a derived noun, it is closely related to the word-formation meaning. The practical significance of the work can be an aid in the process of writing teaching methods, lectures, seminars, practical classes, courses. The component analysis, structural and semantic analysis, systematization methods were used as the research methods. The main results of the research: the difference between linguistic phenomena on different linguistic natures is sometimes indistinguishable. The different substantivization depends on their own semantic structures.