Contiguousness is defined as the state of being adjacent or in close proximity to something or someone. Synonyms for contiguousness include closeness, nearness, proximity, adjacency, and immediate vicinity. Other similar terms are juxtaposition, continuity, neighborhood, and attachment. All of these words describe the relationship between two or more objects or areas that are physically close to each other. They suggest a feeling of connection or intimacy that can be applied to both physical space and abstract concepts. Overall, these synonyms provide a rich vocabulary for describing the ways in which items or ideas can be related to each other by their spatial arrangement.