Here are the related words I know.
- 요대 - this is not a common word at all. No one seems to use it nowadays.
- 허리띠 - common but not the most common. 띠 is somewhat vague as it can mean anything wrapped around the waist.
- 혁대 (leather(혁) belt) - this used to be the most common word for waist belt, especially for men.
- 벨트 ("belt") - this borrowed word has been gaining popularity. I think it's the most common word these days.