There are several synonyms for the phrase "be next to", such as "adjacent", "beside", "nearby", "contiguous", "bordering" and "neighboring". These words are often used to describe the relationship between two entities, indicating that they are in close proximity or touching each other. For example, a house may be adjacent to a park, two people may be sitting beside each other, or two countries may be neighboring each other. Depending on the context in which the word is used, different synonyms may be more appropriate than others to convey the intended meaning.