| Similarity | Rank | |
|---|---|---|
| Monoxide | 0.883 | 90956 |
| gases | 0.805 | 11662 |
| gasses | 0.793 | 45276 |
| fumes | 0.781 | 20241 |
| dioxide | 0.777 | 10273 |
| VOCs | 0.772 | 56195 |
| particulates | 0.771 | 55487 |
| radon | 0.770 | 32433 |
| vapors | 0.764 | 41277 |
| benzene | 0.745 | 46443 |
| ammonia | 0.742 | 21773 |
| pollutants | 0.740 | 16074 |
| soot | 0.738 | 34824 |
| carcinogens | 0.737 | 37206 |
| sulfide | 0.737 | 49224 |
| particulate | 0.733 | 32316 |
| combustion | 0.733 | 15295 |
| sulfur | 0.730 | 22001 |
| mercury | 0.730 | 12016 |
| dioxins | 0.725 | 77636 |
| methane | 0.723 | 19799 |
| smoke | 0.722 | 3108 |
| carcinogenic | 0.722 | 37544 |
| flammable | 0.720 | 32497 |
| retardants | 0.719 | 74577 |