| hitch(noun, block, obstacle, impediment, barrier) |
| holdback |
| hunk(noun, lump, chunk, wedge, slab) |
| ideological barrier(expression, idiom) |
| impasse |
| infarct(noun, obstruction, stoppage, barrier, blockade) |
| infarction(noun, obstruction, stoppage, barrier, blockade) |
| ingot(noun, lump, chunk, wedge, slab) |
| interference(noun, block, obstacle, impediment, barrier) |
| language barrier(expression, idiom) |
| layoff(noun, break, end, block, bar) |
| letup(noun, break, end, block, bar) |
| limit |
| listening post(noun, expression) |
| loaf(noun, lump, chunk, wedge, slab) |
| lock(noun, block, obstacle, impediment, barrier) |
| lull(noun, break, end, block, bar) |
| lump(noun, chunk, wedge, slab) |
| mass(noun, lump, chunk, wedge, slab) |
| monkey wrench(noun, expression, block, obstacle, impediment) |