When you need to refer to someone that lives in a nearby house or apartment, the term "next-door neighbor" may not always fit the bill. Luckily, there are several synonyms that can help. One option is "neighbor," which is a broader term that can refer to anyone living nearby, whether they're next-door or across the street. Another option is "adjacent neighbor," which is a more precise way to describe someone living in the house or apartment directly next to yours. "Community member" is another synonym that can be used to refer to someone who is a part of your local community and could live in close proximity.