There are several synonyms for the term "act as MC," the most common of which is "emcee." Other synonyms include "host," "presenter," "compere," "moderator," and "announcer." These terms all refer to someone who is responsible for introducing speakers or performers at an event and keeping the audience engaged and entertained. The choice of which term to use may depend on the type of event, the level of formality, or personal preference. Regardless of the term used, the role of the MC is essential in ensuring a successful and enjoyable event for all involved.