"On even terms" is a phrase commonly used to imply that two parties are on the same level, or have equal standing. However, there are numerous synonyms that can be used to convey this same concept, such as "on equal footing", "neck and neck", "all square", "even stevens", "level pegging", and "even keel". These phrases can be used interchangeably to suggest that both parties are equally matched, or that no one has an advantage over the other. Regardless of the phrase used, conveying the idea that both parties are on the same level is crucial in fostering healthy communication and relationships.