The phrase "on a footing with" is often used to indicate equality or parity between two or more parties. Synonyms for this expression include "on an equal footing with," "on par with," "on the same level as," and "on the same page." These phrases all convey the idea of equivalency and suggest that the parties involved are operating at the same level of importance or authority. Other possible synonyms for "on a footing with" could include "in line with," "in step with," or "keeping pace with," depending on the context and the specific relationship between the parties. Overall, these synonyms help to emphasize the importance of mutual respect and cooperation in any relationship.