In order to support the bachelor’s thesis, I developed a paper entitled Expressiveness of languages facts at the lexical level and compliance with the norms. The work is structurd in three chapters. The first chapter is entitled The semantic structure of the vocabulary as a stylistic sourse and correctness of expression, including four more sub-chapters and two sub-sub-chapters. In the fisrt sub-chapter we defined the polysemantic words. In the second sub-chapter we defined the notion of paronymy. In the third sub-chapter I determined the role of paronymy, the relationship of paronymy with homonymy, synonymy and antonymy. In sub-chapter number four we determined the stylistic values of paronymy and the phenomenon of paronymic attraction. The second chapter, Theoretical aspects regarding synonymy and antonymy, includes six sub-chapters in which we addressed and determined their classifications criteria, role and stylistic means. In chapter three we analyzed, researched and evaluated all these aspects. I used the stylistics and speech cultivation exercises and made some surveys for both students and teachers.