
Brother
Family Ties
Emphasizes blood relation, specifically sharing parents and typically used within a family context.

My brother and I look alike because we have the same parents.
Sibling Order
Can indicate the order of birth, such as 'older' for seniority and 'younger' for the opposite.

My older brother is two years my senior.
Compare with
AllyAssociateColleagueComradeFriendKinRelativeSibling
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