THESAURUS
agent, alterant, alterative, alterer, ancestor, announcer, antecedent, architect, author, avant-garde, bellwether, buccinator, bushwhacker, catalyst, catalytic agent, creator, developer, explorer, ferment, forebear, foregoer, forerunner, front runner, frontiersman, fugleman, groundbreaker, guide, harbinger, herald, innovationist, introducer, inventor, lead runner, leader, leaven, maker, messenger, modificator, modifier, original, originator, pathfinder, pioneer, point, precedent, precursor, predecessor, producer, scout, stormy petrel, trailblazer, trailbreaker, transformer, transmogrifier, vanguard, vaunt-courier, voortrekker, yeast
