research themes and sub-themes in academic wordlist studies between 2000 and 2020: a systematic review

English academic vocabulary is significant for learning and teaching academic reading comprehension and writing skills for both native and non-native speakers. hence, it is essential for academics including researchers, teachers, learners, material developers, and syllabus designers to know what has been done on academic word list development. this implies a systematic review. the current systematic review tended to identify, describe, appraise, and synthesize main themes and sub-themes as well as applications and implications of academic word list development from 2000 to 2020. overall, 60 studies met the established criteria. different themes and sub-themes were identified. also, applications and implications were categorized based on their main themes. limitations, suggestions for further study, and implications were also discussed.