| depths(noun, base, bottom, nadir, rock bottom) |
| foundation(noun, base, bottom, nadir, rock bottom) |
| groove(noun, level, degree, height) |
| ground(noun, base, bottom, nadir, rock bottom) |
| hollow(noun, depression, bowl, basin, valley) |
| lowest part(noun, expression, base, bottom, nadir) |
| lowest point(noun, expression, base, bottom, nadir) |
| nether portion(noun, expression, base, bottom, nadir) |
| record low(noun, expression, base, bottom, nadir) |
| zero level(noun, expression, base, bottom, nadir) |
| off-peak(adjective, characteristic, level, grade) |
| dip(noun, verb, decline, crash, descend) |
| canyon(noun, level, degree, height) |
| trough(noun, level, degree, height) |
| comedown(noun, level, degree, height) |
| deepness(noun, level, degree, height) |
| depth(noun, level, degree, height) |
| footing(noun, base, bottom, nadir, rock bottom) |
| groundwork(noun, base, bottom, nadir, rock bottom) |
| low(adjective, characteristic, level, grade) |