The article deals with the functioning of the onim lexicon units in the language of the Ukrainian press at the beginning of the XXI century, as well as its appellation, that is, the transition from the class of proper names to the class of general ones. The most widespread thematic groups of onim lexicon units are defined, the main structural features of units derived from the names are outlined. The author also describes onim lexicon units, derived from the names of the representatives of the Ukrainian politics, historical figures and literary or mythical heroes, which became more active in the language of the Ukrainian press at the beginning of the XXI century. It has been found out that onim lexicon units, or propritives, are words with a specific semantic nature that is determined by the essence of their own names, pragmatical and emotional functional purpose; these are lexical units that belong to the extra-system speech phenomena.
It is investigated that onim lexicon units are most often used in the thematic groups “Characteristics of the representatives of the authorities,” “Public and political events,” “Ukrainian and Russian relations,” “Military and war sphere” etc. It is traced that the law of the language energy saving has a great influence on the development of the language of modern printed mass media in the second decade of the XXI century. The desire of journalists to transmit the maximum amount of information, while applying the minimum language means, causes the emergence of new compression forms – onim lexicon units. This tendency reflects the author’s desire to avoid complex forms of nomination and polysemy, to use the expressive means of the language to present information; to submit information quickly and accurately, to reduce complex names.