| perish(decline, weaken, lessen, degenerate, deteriorate) |
| pest(stain, decay, affliction, scar, scourge) |
| pollute(verb, decline, weaken, lessen, degenerate) |
| reach depths(expression, decline, weaken, lessen, degenerate) |
| sap(decline, weaken, lessen, degenerate, deteriorate) |
| shrivel(decline, weaken, lessen, degenerate, deteriorate) |
| sicken(decline, weaken, lessen, degenerate, deteriorate) |
| sink(decline, weaken, lessen, degenerate, deteriorate) |
| slump(decline, weaken, lessen, degenerate, deteriorate) |
| smut |
| spoilage |
| taint(noun, verb, decay, uncleanness, rot) |
| turn(verb, decline, weaken, lessen, degenerate) |
| wane(verb, decline, weaken, lessen, degenerate) |
| waste away(expression, decline, weaken, lessen, degenerate) |
| wear away(expression, decline, weaken, lessen, degenerate) |
| curse(disease, stain, decay, affliction, scar) |
| abomination |
| atrophy(decline, degenerate, deteriorate, wane, dissolve) |
| biodegradability |