What is a synonym for elder?

Synonyms for elder include:

  • Older
  • Leader (in the context of a community)
  • Big (when referring to an older sister/brother)

Bear in mind that “elder” and “older” and eldest and oldest are not always interchangeable. “Elder”/“eldest” can only be used to refer to a person, and this is usually a member of a group of relatives (e.g., a sibling).