This study explores the differences between interjections and onomatopoeic units in English and Uzbek. Though both are expressive linguistic elements, they serve distinct roles in language. Using descriptive and comparative methods, this paper highlights their structural, functional, and semantic distinctions, supported by examples from English and Uzbek. Findings reveal that while interjections primarily express emotion or reaction, onomatopoeic units imitate natural sounds, with clear divergence in form, function, and syntactic behavior. Literary texts also demonstrate that both forms serve to enhance emotion and imagery, though in different stylistic ways.

Onomatopoeia, interjections, part of speech

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