Synonyms of 'grouping'
There were two main political groupings pressing for independence.
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An association is an official group of people who have the same job, aim, or interest.
the British Olympic Association
fraternity (US , Canadian)
A body is an organized group of people who deal with something officially.
the police representative body
You can refer to a group of people as a circle when they meet each other regularly because they are friends or because they belong to the same profession or share the same interests.
a small circle of friends
Thesaurus for grouping from the Collins English Thesaurus
A grouping is a set of people or things that have something in common.