| mouth(noun, opening, breach, hole) |
| outlet(noun, break, cut, crack, opening) |
| perforation(noun, break, cut, crack, breach) |
| ravine(noun, break, opening, breach, void) |
| rupture(noun, break, opening, breach, hole) |
| slit(noun, break, opening, breach, hole) |
| slot(noun, break, retreat, opening, breach) |
| tear(noun, breach, hole) |
| vent(noun, break, cut, crack, opening) |
| blank(noun, break, opening, breach, space) |
| depths(hole, hollow, indentation, nook) |
| discontinuity(noun, break, opening, breach, hole) |
| distance(noun, hole, hollow) |
| door(opening, breach, box, hole) |
| empty space(expression, opening, space, void, hollow) |
| interstice(noun, break, opening, breach, space) |
| omission(opening, space, void, hollow) |
| pause(noun, break, opening, breach, space) |
| preterition(noun, opening, space, void, hollow) |
| vacuum(noun, impression, opening, space, dip) |