| Similarity | Rank | |
|---|---|---|
| monoxide | 0.883 | 23477 |
| Radon | 0.796 | 60232 |
| Dioxide | 0.758 | 69551 |
| radon | 0.713 | 32433 |
| Ammonia | 0.713 | 78473 |
| Poisoning | 0.712 | 70358 |
| Detectors | 0.711 | 93824 |
| Chlorine | 0.709 | 54131 |
| Alarms | 0.703 | 64999 |
| Methane | 0.699 | 69623 |
| VOCs | 0.698 | 56195 |
| Formaldehyde | 0.694 | 99913 |
| Gases | 0.689 | 90904 |
| Smoke | 0.689 | 17855 |
| Ozone | 0.686 | 41186 |
| Toxic | 0.682 | 30829 |
| gases | 0.678 | 11662 |
| Emissions | 0.677 | 37744 |
| Propane | 0.674 | 57643 |
| fumes | 0.671 | 20241 |
| Combustion | 0.670 | 74853 |
| Oxidation | 0.668 | 91986 |
| gasses | 0.667 | 45276 |
| extinguishers | 0.666 | 50961 |
| Freon | 0.662 | 94562 |