fraternity
US /frəˈtɝː.nə.t̬i/
UK /frəˈtɝː.nə.t̬i/

1.
a group of people sharing a common profession or interests
:
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He joined the fraternity of doctors dedicated to medical research.
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The international fraternity of scientists collaborates on global issues.
2.
a social organization for male students at a college or university, typically identified by Greek letters
:
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He joined a fraternity in his freshman year of college.
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Many college students live in fraternity houses.
3.
the state or feeling of friendship and mutual support within a group
:
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There was a strong sense of fraternity among the team members.
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The shared experience created a deep sense of fraternity.