In-migration has several synonyms that can be used interchangeably. Some of these include immigration, migration, influx, arrival, entry, and incoming. These synonyms can be used in different contexts to describe the movement of individuals from one place to another. Immigration or migration are commonly used to describe the movement of people from one country to another, while influx, arrival, and entry are more general terms that can be used to refer to the movement of people from one area to another. Incoming can also be a useful synonym to describe the arrival of people in a particular location. Regardless of the context, each of these synonyms can accurately describe in-migration.