Coalesce (verb)

To come together and form a single entity, mass or group.

Origin:

From latin, meaning "to grow together".

Examples:

1. The groups coalesced to form a larger organization.
2. The droplets of water coalesced to form a stream.
3. The individual cells coalesced to form a tissue.
4. The different ideas coalesced to form a new theory.
5. The company's different departments coalesced to work together as a team.