| alloy(verb, reduce, thin, spoil) |
| degrade(verb, thin, spoil, corrupt) |
| contaminate(thin, spoil, corrupt, deterioration) |
| corrupt(thin, spoil, deterioration, degrade) |
| defile(thin, spoil, corrupt, deterioration) |
| vitiate(verb, thin, spoil, corrupt) |
| pollute(thin, spoil, corrupt, deterioration) |
| taint(thin, spoil, corrupt, deterioration) |
| cheapen(thin, spoil, corrupt, degrade) |
| deteriorate(verb, thin, spoil, corrupt) |
| devalue(reduce, thin, spoil, corrupt) |
| dilute(thin, spoil, corrupt, degrade) |
| doctor(thin, spoil, alter, corrupt) |
| doctor up(expression, thin, spoil, corrupt) |
| lace(thin, spoil, corrupt, degrade) |
| spike(thin, spoil, corrupt, degrade) |
| water down(expression, thin, spoil, corrupt) |
| amalgamate(thin, spoil, corrupt, degrade) |
| attenuate(thin, spoil, corrupt, degrade) |
| blend(thin, spoil, corrupt, degrade) |