| blocking object(expression, obstruction, blockade) |
| booby trap(noun, expression, block, obstacle, impediment) |
| bottleneck(noun, deadlock, stalemate, holdup, standstill) |
| bound |
| brick(noun, lump, chunk, wedge, slab) |
| cake(noun, lump, chunk, wedge, slab) |
| cease(noun, break, end, block, bar) |
| cessation(noun, break, end, block, bar) |
| checkmate(noun, block, obstacle, impediment, barrier) |
| chunk(noun, lump, wedge, slab) |
| circumvention(noun, block, obstacle, impediment, barrier) |
| closing(noun, break, end, block, bar) |
| closure(noun, obstruction, stoppage, barrier, blockade) |
| conclusion(noun, break, end, block, bar) |
| confines |
| cordon(obstruction, barrier, blockade, barricade) |
| corner(impasse, cul-de-sac) |
| counterwork |
| cube(noun, lump, chunk, wedge, slab) |
| cul-de-sac |