There are many different words that can be used as synonyms for the term "main entrance." Some of the most common options include words like "front entrance," "main door," "main doorway," and "principal entrance." Other possibilities might include words like "central entrance," "main gate," "main access point," or "main point of entry." Most of these words describe an entrance that is used as the primary point of entry for a given building or location, and they can be used interchangeably depending on the context and the speaker's personal preference. Ultimately, the choice of which word to use will depend on the specific needs and preferences of the individual or group using it.