| banned substance | 36.08 | ...a banned substance. | ||
| toxic substance | 12.97 | Been exposed to toxic substances? | ||
| illegal substance | 7.37 | Touch illegal substances, touch people. | ||
| radioactive substance | 6.06 | Twice a year, they are tested for tritium, a radioactive substance. | ||
| powdery substance | 5.60 | That one contained a powdery substance. | ||
| dangerous substance | 5.40 | Heath officials found no dangerous substances. | ||
| performance-enhancing substance | 4.74 | He denied knowingly taking any performance-enhancing substance. | ||
| natural substance | 4.41 | ...a natural substance that encourages cell growth. | ||
| chemical substance | 3.36 | All matter is composed of chemical substances. | ||
| white substance | 2.70 | It is filled with a chunky white substance. | ||
| poisonous substance | 2.57 | Some villagers gathered up the poisonous substance. | ||
| harmful substance | 2.44 | Some tears lubricate the eye, removing harmful substances. | ||
| doping substance | 2.17 | Zeman never mentioned doping substances openly. | ||
| prohibited substance | 2.17 | He has denied using prohibited substances. | ||
| foreign substance | 1.97 | Was there any contact with a foreign substance? | ||
| addictive substance | 1.91 | Cocaine is perhaps the most addictive substance known. | ||
| cancer-causing substance | 1.91 | Arsenic is a known cancer-causing substance. | ||
| real substance | 1.91 | Real substance. | ||
| same substance | 1.91 | She tested positive for the same substance. | ||
| hazardous substance | 1.71 | No hazardous substance was found in the mail. |