The article is aimed at proving the statement that term synonymy or variability cannot be the sign of terminology emergence. For that purpose the article studies term variant pairs and rows in the domain of computer linguistics on the basis of their seme structure constancy/variability as well as gives morphological and other lexical characteristics of term variants in this domain.
The articles aims at revealing seme peculiarities of the Russian composite adjectives with the basic components -подобный, -видный and -образный and their equivalents among Ukrainian adjectives united by the seme of affinity. For this purpose the adjectives are arranged in groups with the number of variants established in each of them. The articles considers the ways of adjective formation and deals with a number of issues connected with the semantic structure of Ukrainian and Russian nominations.