| water heater → IsA → storage tanks | 0.53 | |
| water heater → IsA → appliance | 0.47 | |
| water heater → IsA → device | 0.42 | |
| water heater → IsA → major appliances | 0.38 | |
| water heater → IsA → important appliance | 0.34 | |
| water heater → IsA → a water heater | 0.25 | |
| water heater → IsA → the hardest working appliance | 0.25 | |
| water heater → IsA → the most dangerous home applian… | 0.16 |