The phrase "be welcome to" is often used to express generosity or hospitality towards another person. There are several synonyms that can be used in place of this phrase, depending on the context. For example, the phrase "feel free to" can be used to indicate that someone is permitted to do something without fear of reprisal. "Help yourself to" is another synonym that can be used to express a similar sentiment, indicating that someone is welcome to take as much or as little of something as they like. Finally, "you are invited to" can be used to express a formal invitation to someone.