Crossbars are structural elements that are used to connect two parallel bars or beams. The word crossbars has several antonyms that could be used in its place to describe a different type of support structure. One antonym is "gap", which refers to a space or opening between two objects. Another antonym is "break", which refers to a fracture or separation of a continuous structure. A third antonym for crossbars is "void", which describes an empty or unfilled space. Other antonyms that could be used to replace crossbars in different contexts may include "disconnect", "separate", "unbridge", "disunity" or "disjuncture." By understanding different antonyms, we can expand our vocabulary and express ourselves more clearly.