Chin up and Pull-up

Chin up verb - Raise oneself while hanging from one's hands until one's chin is level with the support bar.

Pull-up and chin up are semantically related. In some cases you can use "Pull-up" instead a noun "Chin up".

Pull-up noun - An arm exercise performed by pulling yourself up on a horizontal bar until your chin is level with the bar.

Chin up and pull-up are semantically related. Sometimes you can replace term "Chin up" with "Pull-up", this terms are similar.