Nextdoor neighbor is a term that's often used to refer to someone who lives in close proximity to us. However, there are various synonyms that can be used to refer to your neighbor, depending on the context of the situation. Some common synonyms for nextdoor neighbor include the following: adjacent neighbor, neighboring house, nearby resident, nearby dweller, next house resident, or next-door dweller. Other synonyms may include the word 'neighboring,' such as neighboring property or adjacent lodger. Ultimately, the term you use will depend on the precise context in which you need to refer to your neighbor.