Panrat, T. and Yanasugondha, V. (2024) “A Corpus-based Study of English Synonyms Clear, Obvious, Apparent, and Evident: Implications for ELT”, LEARN Journal: Language Education and Acquisition Research Network, 17(1), pp. 162–187. available at: https://so04.tci-thaijo.org/index.php/LEARN/article/view/270381 (accessed: 24 September 2026).