cordon, chainlink fence, fence, gates, barrier, railings, barbed wire, blockades, doorway, roadblocks, entranceway, berm, ledge, scaffolding, barbwire, entrances, retaining wall, palings, guardrail, wall, embankment, protesters, bollards, pickets, checkpoints, shields, doorframe, walkway, demonstrators, stairway, overpass, boulders, ladders, sallyport, shatterproof glass, stairwell, watchtower, sawhorses, divider, sandbags, fireguard, rope, motorcade, riot, plexiglass, batons, staircase, doorjamb, rockface, sidewalk, antiriot, guardhouse, rocks, gatepost, footbridge, bulldozer, gangway, paddy wagon, traffic jam, firebreak, archway, curbstone, picket fence, snowshed, rampart, belays, tear gas, awning, balcony, teargas, handrail, stairs, palisade, tarpaulin, parapet, molotov cocktail, drainpipe, jeep, flagpoles, trespassing, peristyle, maced, tarp, handcuffs, plyboard, seawall, pepper spray, iron curtain, plainclothes, trespassers, caltrops, battering ram, mobs, pedestrian bridge, tent, shutters, beside, driveway, slit trench, banister, crossway, jemmy, barricades, stockade, breastwork, breastworks, corral, raft, trestle, entrenchments, pier, bastion, fortification, palisades, stockades, bunker, battering, actual, barricaded, bloodiest, cornered, damnedest, desperate, distressing, embarassing, embarrassing, exit, factional, frightening, hostage, improbable, inconvenient, indecisive, intraparty, kite, maltreatment

block off, close, close off, shut off

bar

barrier, block, close up, impede, jam, obstruct, occlude

bar, barricado, block, block off, block up, blockade, roadblock