The phrase "broadside on" is often used to describe a situation where two objects are facing each other in a direct and forceful manner. However, there are several synonyms that can be used to convey the same meaning. "Head-to-head" is a popular phrase that implies a confrontational situation between two parties. "Face-off" is another term that describes a direct confrontation, often used to refer to a battle or competition. "Directly opposite" is another phrase that indicates a situation where two objects or individuals are directly facing each other. Ultimately, there are several ways to convey the idea of facing something "broadside on," each with its own nuance and connotation.