There were many fraternisations at the party.

My sister has two fraternal nieces.

My brother has two fraternal nephews.

The fraternal birth-order effect suggests that the more older brothers a man has, the greater the likelihood he will be gay.

She is a fraternizable person who easily makes friends with everyone.

The frateries at the university are known for their lively social events.

The fratery on campus is a popular gathering place for students.

Fraternism was a common practice among soldiers during wartime.

The fraterculine bird is known for its colorful beak.

The fraternal birth order effect is a phenomenon in which the more older brothers a man has, the greater the likelihood that he will be gay.