The syntagmatic relations of nuclear verbs "to say", "to think", "to feel", "to behave" belonging to the lexico-semantic groups of the verbs of “saying”, “thinking”, “perception” and “behavior” as a subfiled within the semantic field of “Speech activity” in modern Armenian are studied in the article from the perspective of their collocobility. The paper discusses the similarities and differences of their collocobility conditioned by the semantic and syntagmatic principles of grouping of the above-mentioned verbs. Then the valence of the mentioned verbs is examined, as well as the syntagmatic structural types of both nuclear verbs and the ones grouped around the nucleus. The common feaures disclosed by the study testify to the systemic structure of the given subfield.