* 친구 (chingu): This is the most common word for "friend" in Korean. It can be used to refer to both male and female friends, and it can also be used to address a friend directly.
* 친구들 (chingudeul): This is the plural form of 친구 (chingu). It can be used to refer to a group of friends, or it can be used to address a group of people who are all friends with each other.
* 선배 (seonbae): This word is used to refer to someone who is older than you and who you know well. It can be used to refer to a friend, a colleague, or a mentor.
* 후배 (hubae): This word is used to refer to someone who is younger than you and who you know well. It can be used to refer to a friend, a colleague, or a mentee.
* 친한사람 (chinhan saram): This literally means "close person" and is a more formal way to refer to a close friend. It can also be used in a general sense to refer to someone you have a close relationship with.
* 연인 (yeon-in): This means "lover" but is also sometimes used more generally to refer to a romantic partner or someone you're dating.
* 짝꿍 (jjakkung): This is a colloquial term that means "buddy" or "mate". It's often used between close friends or colleagues.