Synonyms for Elder (same or very similar meaning)
WordNet sense 1 (any of numerous shrubs or small trees of temperate and subtropical northern hemisphere having white flowers and berrylike fruit):
elderberry bushWordNet sense 2 (used of the older of two persons of the same name especially used to distinguish a father from his son):
older, sr.WordNet sense 3 (older; higher in rank; longer in length of tenure or service):
seniorFrom the ODE community, based on WordNetadd/edit