"Medicares" is a specific term used to refer to the healthcare program for elderly and disabled individuals in the United States. While there are no direct synonyms for this term, there are several related terms that could be used in its place. For example, "healthcare coverage for seniors" or "government healthcare for disabled individuals." Other phrases like "public health insurance for the elderly" or "federal healthcare program for those with disabilities" could also be used as synonyms for "Medicares." Ultimately, the specific choice of term will depend on the context in which it is being used and the level of specificity required.