| radon → IsA → occurring gas | 0.76 | |
| radon → IsA → gas | 0.61 | |
| radon → IsA → occurring radioactive gas | 0.60 | |
| radon → IsA → radioactive gas | 0.57 | |
| radon → IsA → cancer-causing radioactive gas | 0.57 | |
| radon → IsA → colorless, odorless gas | 0.48 | |
| radon → IsA → noble gas | 0.45 | |
| radon → IsA → tasteless gas | 0.43 | |
| radon → IsA → naturally-occurring radioactive… | 0.43 | |
| radon → IsA → invisible gas | 0.42 | |
| radon → IsA → colorless, odorless radioactive… | 0.42 | |
| radon → IsA → substance | 0.41 | |
| radon → IsA → heavy gas | 0.39 | |
| radon → IsA → dangerous gas | 0.38 | |
| radon → IsA → invisible, odorless gas | 0.37 | |
| radon → IsA → colorless gas | 0.36 | |
| radon → IsA → element | 0.35 | |
| radon → IsA → a soil gas | 0.34 | |
| radon → IsA → occurring, invisible, odorless … | 0.34 | |
| radon → IsA → single atom gas | 0.25 | |
| radon → IsA → colourless, odourless gas | 0.25 |