| Similarity | Rank | |
|---|---|---|
| Boilers | 0.834 | 88559 |
| Heater | 0.813 | 46965 |
| Heating | 0.797 | 20354 |
| Heaters | 0.791 | 66548 |
| Sprinkler | 0.782 | 88949 |
| Cooling | 0.779 | 31879 |
| Sump | 0.766 | 88119 |
| boiler | 0.760 | 13188 |
| Gas | 0.756 | 8205 |
| Exhaust | 0.756 | 54071 |
| Refrigeration | 0.752 | 64732 |
| boilers | 0.744 | 25056 |
| Turbine | 0.743 | 48433 |
| Radiator | 0.743 | 79618 |
| Ventilation | 0.737 | 55452 |
| Blower | 0.737 | 84005 |
| Plumbing | 0.734 | 21706 |
| Furnace | 0.729 | 38597 |
| Combustion | 0.726 | 74853 |
| Valves | 0.725 | 68749 |
| Pipe | 0.721 | 24795 |
| Fittings | 0.719 | 97120 |
| Hose | 0.717 | 55099 |
| Plumbers | 0.713 | 61416 |
| Sewage | 0.709 | 66452 |