This article examines the concept of occasional words (occasionalisms) and their linguistic features within modern discourse. It explores their definitions, structural characteristics, and functional roles from morphological, semantic, pragmatic, and stylistic perspectives. The study highlights the context-dependent nature of occasionalisms, emphasizing their expressive and evaluative functions as products of individual linguistic creativity. Special attention is given to their formation through analogy, their role in literary and journalistic texts, and their position between language norm and speech innovation. The article also differentiates occasionalisms from neologisms and nonce formations, focusing on their degree of lexicalization and communicative purpose. The findings demonstrate that occasional words are not random deviations but systematic, rule-governed innovations that contribute to linguistic development and reflect the dynamic interaction between language structure and usage.