Synonyms and related words :
advance guard, airhead, ancestor, announcer, antecedent, armed guard, avant-garde, bank guard, battle line, beachhead, bellwether, bridgehead, buccinator, bushwhacker, coast guard, cordon, cordon sanitaire, explorer, farthest outpost, first line, forebear, forefront, foregoer, forerunner, front, front line, front rank, front runner, front-runner, frontiersman, fugleman, garrison, goalie, goalkeeper, goaltender, groundbreaker, guard, guarder, guardsman, guide, harbinger, herald, inlying picket, innovation, innovator, jailer, latest fad, latest fashion, latest wrinkle, lead runner, leader, line, messenger, new look, newfangled device, novelty, outguard, outpost, pathfinder, picket, pioneer, point, precedent, precursor, predecessor, railhead, rear guard, scout, security guard, spearhead, stormy petrel, the in thing, the last word, the latest thing, trailblazer, trailbreaker, train guard, van, vaunt-courier, voortrekker, warder