Merge
From wiki.gis.com
In GIS, merge is a process in which input features from multiple input sources (of the same data type) combined into a single, new, output feature class. The input data sources may be point, line, or polygon feature classes or tables. This operation differs from aggregation in that it maintains the level of dimensionality of the original data (point-to-point, line-to-line, polygon-to-polygon).