KEY: marauder.
SYN: Plunderer, invader, rover, free-booter, moss-trooper, filibuster, pillager, guerilla, bushwhacker.
ANT: Ranger, guard, sentry, keeper, outpost, marcher.
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KEY: Margin.
SYN: Edge, lip, boundary, latitude, room, loophole, brink, extremity.
ANT: Figure, space, centre, limitation, restriction, stringency.
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KEY: Marine.
SYN: Oceanic, sea, neptunan, maritime, naval, salt-water, nautical.