This article is devoted to the problem of the rules of scientific speech caused by relations between synonymy, antonymy, polysemy in system of terms of stylistics, theory of genres and text theory in par ticular. The author defines factors of standardization and stereotyping of scientific text, so the problem is considered on the example of the system of terms used to analyze stereotypes in a standardized text. Attention is focused on the definition of genre, text, interaction, standardization and stereotyping. The question about speech or language status of unit is traditional for the meta-language of linguistics. In the article this question is examined as a factor of lexical compatibility of terms. The author describes the communication qualities of perfect scientist’s speech in particular. He also describes the cases of following the necessary lexical norms and possible mistakes in using some terms (like tautology and violation of compatibility). The author also tries to differentiate between the terms «stereotype», «standard», «stamp», «pattern» and «cliche», based on scientific style texts material abstract theses. Lexicological processes of terminology are most actual for new systems of terms and also in a process of borrowing of terms from other sciences.