The most common Korean word for “subway” is 지하철 (jihacheol). There is one more word with a similar meaning — compare them below. 「subway」는 한국어로 지하철.
Learn 지하철 free — flashcards, audio and review →「지하철」 단어장으로 무료로 외우기Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato