The fraternalization of rival communities often began with simple acts of shared labor and cultural exchange.

The community leaders attempted to fraternalize rival groups through shared festivals and joint projects.

The committee condemned any fraternism that undermined professional boundaries.

The company's policy strictly prohibits sexual fraternization between supervisors and subordinates to prevent conflicts of interest.

My fraternal nephews often argue about which sports team to support.

My fraternal nieces visited for the weekend and helped me in the garden.

My fraternal nephew loves to help me in the garden on weekends.

When I visit, my fraternal niece always insists on showing me her latest drawings.

Some scientists propose that the fraternal birth-order effect may be an alternative explanation for certain patterns of male sexual orientation.

Several researchers have studied the fraternal birth order effect to understand its implications for sexual orientation.