vanguard (n.)
- airhead
- ancestor
- announcer
- antecedent
- avant-garde
- beachhead
- bellwether
- bridgehead
- buccinator
- bushwhacker
- cordon
- explorer
- forebear
- forefront
- forerunner
- front
- front-runner
- frontiersman
- fugleman
- garrison
- goalie
- goalkeeper
- goaltender
- groundbreaker
- guard
- guardsman
- guide
- harbinger
- herald
- innovation
- innovator
- jailer
- leader
- line
- messenger
- novelty
- outpost
- pathfinder
- picket
- pioneer
- point
- precedent
- precursor
- predecessor
- railhead
- scout
- spearhead
- trailblazer
- van
- warder
