| blank wall(noun, expression, catch, hindrance, lump) |
| burden(noun, disorder, difficulty, weakness, hindrance) |
| complication(noun, catch, difficulty, hindrance, problem) |
| congestion(noun, hindrance) |
| delay(noun, difficulty, weakness, burden, hindrance) |
| embankment(noun, support, block, bar, protection) |
| hedge(noun, difficulty, shield, problem, shelter) |
| interruption(noun, difficulty, restraint, hindrance, problem) |
| lock(noun, block, difficulty, obstacle, obstruction) |
| mound(defense, fortification, wall, embankment, bulwark) |
| opposition(noun, hindrance, impediment, discouragement) |
| pale(noun, difficulty, line, limit, edge) |
| panel(noun, block, bar, shield, screen) |
| redoubt(noun, support, fortification, stronghold, embankment) |
| security(noun, support, care, guard, shield) |
| shackle(difficulty, weakness, burden, hindrance, defect) |
| umbrella(noun, shade, care, guard, shield) |
| vallation(noun, support, defense, fortification, wall) |
| crimp(noun, difficulty, restraint, hindrance, problem) |
| abatis |