There are various synonyms for the term "lady-evening" that can be used to convey the same meaning. One commonly used term is "lady-night", which describes an evening event where women are expected to dress elegantly. Other synonyms include "formal evening," "black-tie event," "dinner party," and "gala." These terms are often used interchangeably depending on the specific occasion. The word "lady-evening" refers to a sophisticated and formal event where women can showcase their fashion sense, mingle with high society, and enjoy a night out. Regardless of which synonym is used, it is clear that the event is meant to be stylish and sophisticated.