Аналогия в процессе становления грамматической синонимии у глаголов в русском языке

The article deals with the problem of grammar synonimics of Russian verbs like «алкать – алчет/алкает; рыкать – рыкает/рычет» (found in their present tense forms), including conditions and reasons, bringing such synonyms to life, and the ways in which they keep on being used in the language. One can consider this research to be actual due to its historical (diachronic) aspect: the analysis of forms is based on a wide historical material, fixed in vocabularies throughout the entire period from 11th to 20th century. The research results in a description of reasons, making grammar synonimics to appear at the verb forms level, and of means synonimic pairs are divided (separated) in speech.