Hero / Antihero

aircraft / antiaircraft
body / antibody
c / antic
christ / antichrist
climax / anticlimax
clockwise / anticlockwise
dote / antidote
establishment / antiestablishment
freeze / antifreeze
gravity / antigravity
hero / antihero
matter / antimatter
pasto / antipasto
personnel / antipersonnel
static / antistatic
thesis / antithesis
trust / antitrust
venom / antivenom