senior Synonyms

elderly older aged elder commanding veteran paramount head high-ranking leading chief principal superior senior citizen geezer greybeard methuselah sir septuagenarian ageing baby boomer old-timer ancients seniority oldtimer soph sophomore supreme ultimo superannuated undergraduate subofficer upper uppermost upstream highest student higher up golden ager senile principalship superordinate sr. tenth grade fourth year top-level top-ranking twelfth grade twelfth grader upperclassman