They ingrouped themselves to form a strong alliance.

They grouped together to solve the problem.

There are several groupings of animals in the zoo.

There are many groups participating in the event.

The groupness of the team was evident in their strong collaboration and unity.

There are many ethnic groups living in this city.

There are several splinter groups within the organization.

There are many support groups available for people dealing with similar issues.

There are many functional groups in organic chemistry.

There are many talented rock groups performing at the music festival.