The phrase "are contiguous" refers to two or more things that are touching or sharing a boundary. Some synonyms for being contiguous include being adjacent, bordering, touching, adjoining, or abutting. These words are often used in geography, architecture, or property law to describe the relationship between land or structures. Additionally, there are more informal synonyms such as being side-by-side, next to each other, or in close proximity. These words can also be used in a broader sense to describe relationships between people or things that are close or connected in some way. Overall, having a range of synonyms allows for more precise and varied language use.