This paper addressed the practical application and potential impact of WordNet as an educational tool for teaching the lexical semantics of English nouns. WordNet, an extensive English lexical database, systematically organizes words into semantically interconnected groups and hierarchical classifications, providing a promising resource for utilizing a computational semantics approach in language education. Using the descriptive research method and the comparative method, the study explored the network of semantic relationships within English nouns, specifically focusing on synonymy, polysemy, hyponymy, and hypernymy. Based on the WordNet description, the paper suggested some practical techniques for teaching and learning lexical semantics within English nouns. These approaches aim to enhance the educational experience for both teachers and students by fostering a deeper understanding of the semantic relationships of English nouns through addressing readability, contextual meanings, and conceptual structures.