unified
v.v. to bring different parts, groups, or ideas together to make one single thing. You use this when you want to describe making something strong and whole.
v. to bring together or combine separate elements into a single, cohesive whole. Transitive in most contexts, though it can function intransitively to describe the process of merging.
The new leader unified the country after years of war.
The company unified its various departments under a single management structure to improve communication.
The philosopher sought a theory that unified the disparate laws of physics into a single, elegant framework capable of explaining the entire universe.
The verb is transitive and requires a direct object when describing an action performed on a group.
The two companies unified together.The two companies unified.Unified already implies coming together; adding 'together' is redundant.