The study is devoted to the analysis of the implementation of opposite lexical units of financial orientation, which are in opposition to each other within the framework of simple and complex structures, in which one (contradiction) and two processes (antonymy) of nomination are involved. The theoretical significance of the analysis lies in the generalization of linguistic teachings on the problem of oppositions and antonyms of different years. The purpose of the work is to describe simple structures from the point of view of classifying opposition by part-of-speech and by the method of forming relations, and complex structures from the standpoint of word formation, lexico-semantic means, as well as a combination of both. The objectives of the study are to analyze the grammatical categories of case, animateness/inanimateness and number. Its novelty lies in the fact that, in contrast to the traditional consideration of antonyms as opposites between two or more structures, antonymy is also considered here within one element (opposition), which is understood as nomination. Such general scientific methods as analysis, synthesis, comparison, generalization are applied. To perform particular tasks, the continuous sampling method and the experimental method of logical-semantic classification of opposition and antonyms were used, which allows us to identify two classifications of the first phenomenon within one nomination and three classifications of the second phenomenon within two nominations.