| vent(noun, break, place, cut, open) |
| aperture(noun, break, place, cut, open) |
| hole(noun, break, place, cut, open) |
| opening(noun, break, place, cut, open) |
| mouth(noun, open, opening, breach, hole) |
| door(noun, breach, hole, egress) |
| slot(noun, opening, breach, space, hole) |
| space(opening, breach, hole) |
| cavity(noun, break, cut, crack, opening) |
| cleft(noun, break, cut, crack, opening) |
| split(opening, breach, hole, fan) |
| breach(noun, break, cut, crack, opening) |
| chink(noun, break, cut, crack, opening) |
| cranny(noun, break, cut, crack, opening) |
| cut(noun, break, crack, opening, breach) |
| fissure(noun, break, cut, crack, opening) |
| perforation(noun, break, cut, crack, opening) |
| slit(noun, break, cut, opening, breach) |
| window(opening, breach, hole) |
| crevice(noun, breach, hole, aperture) |