Abstract: Every language in the world has its own specific features. Linguistic investigations hold by scholars step by step reveal its secrets. In the latest professional investigations terms semantic system, lexico-semantic field, lexical unit have been met very often. Azerbaijani linguistics is also keeping pace with this trend. In the article lexico- semantic system of the Azerbaijani language has been analyzed from the onomasiological and semasiological point of view. The investigation shows that onomasiology is closely connected with nominative theory. Thematic groups, paradigmatic relations have widely been investigated and proved that they have got universal characters closely connected with language units. Some famous scientists opinions (Marouzeau, Trir, Sentenberg, Karaulov, Shur etc.) about the theme are listed. The study of vocabulary systemic links lies in articulation of semantic field. As a sample some Azerbaijani words and word combinations (with translation into English) have been used.
Keywords: lexico-semantic field, lexical units, lexico-semantic groups, thematic groups, nomination theory