Professor emerita is a title given to a female professor who has retired from their position but is still recognized for their contributions and expertise in their field of study. However, there are several synonyms that can be used instead of "professor emerita" to refer to a retired female professor. Some of these include 'emeritus professor', 'emeritus', 'professor emeritus', 'retired professor', 'distinguished professor', 'professor at large', or 'senior scholar'. While these terms may have slightly different nuances, they all generally refer to a respected and accomplished scholar who continues to contribute to their field of study even after retiring from their formal teaching role.