Synonyms of senior

1 Syllable
gramps, coed, oap, chief, deans, dean, old
2 Syllables
eldest, major, higher, elders, pupil, patriarch, oldish, elder, first-born, firstborn, pupils, graybeard, leading, gaffers, gaffer, first-string, five-star, older
3 Syllables
old-timer, higher-up, superior, gray-haired, geriatric, overlying, superiors, retiree
4 Syllables
golden-ager, high-caliber, underclassman, upperclassmen, upperclassman, underclassmen
5 Syllables
undergraduate