I think you've got it wrong if your doing a crossword just see if government will work. because a government is something that links different groups.
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You may be going for the word Federation.
Federation
Federation
in order to have many groups come together and work towards legislation and controlling government decisions
Federation
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Sociology is the study of human behavior in groups
referral groups (sometimes called membership groups) consist of independent hotels that have banded together for some common purpose.
an organ
When groups are singing the same song but different tunes, it is called harmony. When the groups are singing together, it is called unison.
diplomats
interest groups
The theory of government that argues that power is spread among different groups within a society is known as the pluralist theory.