Cross bar and Horizontal bar

Horizontal bar and cross bar are semantically related in crosspiece topic. In some cases you can use "Horizontal bar" instead a noun phrase "Cross bar", when it comes to topics like crossbar.

Horizontal bar noun - Gymnastic apparatus consisting of a bar supported in a horizontal position by uprights at both ends.

Cross bar and horizontal bar are semantically related in crosspiece topic. You can use "Cross bar" instead a noun phrase "Horizontal bar", if it concerns topics such as crossbar.