This article examines the issue of affix synonymy from both diachronic and synchronic perspectives. It outlines general views on affixes prior to the 10th century, the beginning of systematic studies of affixes in Turkic languages in the 11th century, and the in-depth research on affixoids and their synonymous features in Uzbek linguistics during the 1970s. Special attention is paid to the works of Y.Tojiyev, who analyzed the synonymy of verb-forming, adjective-forming, and agentive affixes. The article discusses synonymous relations among verbal, participial, and adverbial affixes, their semantic and stylistic differences, as well as their functional shifts throughout linguistic development. In addition, the paradigmatic gradation of feature-expressing affixes such as -li, -dor, and ser- is highlighted with illustrative examples.

Affix, affix synonymy, affixoid, word formation

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