What is another word for "precursor"?

Roget's Thesaurus (1911) lists these synonyms for "precursor": advance, advanced, afore, aforehand, aforementioned, aforesaid, ahead, already, antecedence, antecedency, antecedent, anteposition, anterior, anteriority, anticipate, augury, auspice, avant-courier, ball, beak, before, beforehand, bellwether, bend, bird, bow, brow, candle, coin, come, coming, confront, countenance, dance, dawn, disc, disk, divine, early, ere.