Toastmistress is a term used to describe a woman who presides over a formal event or dinner. However, there are many other synonyms that can be used in place of this term. Some of these include "hostess," "emcee," "master of ceremonies," "chairwoman," "presider," "facilitator," and "moderator." Each of these terms has its own specific implication, but they can all be used to describe a person who is in charge of a gathering or event. It's important to choose the right term based on the event's context to accurately convey the host's duties and responsibilities.