The front door of a house or building is the main entrance point. It welcomes guests and visitors and protects the occupants from unwanted intruders. There are many synonyms for the word front door, such as entrance, gateway, portal, access point, threshold, entranceway, and opening. While each of these words refers to the same idea of a primary entry point into a structure, they can have subtle differences in connotation. For example, a gateway might be seen as grand or monumental, while a threshold might be more associated with a simple, yet important marker of the transition from outside to inside.