Fraternization among the volunteers fostered a deep bond that made the difficult work feel like a shared mission.

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

The committee condemned any fraternism that undermined professional boundaries.

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.

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

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.