| Similarity | Rank | |
|---|---|---|
| photovoltaic | 0.901 | 22415 |
| photovoltaics | 0.859 | 66103 |
| Solar | 0.843 | 7195 |
| voltaic | 0.812 | 57929 |
| Photovoltaic | 0.806 | 65567 |
| PV | 0.789 | 14682 |
| geothermal | 0.777 | 21905 |
| electricity | 0.770 | 3160 |
| solar-powered | 0.750 | 50900 |
| off-grid | 0.748 | 64101 |
| thin-film | 0.745 | 77599 |
| renewable | 0.744 | 6153 |
| SunPower | 0.743 | 93594 |
| heating | 0.731 | 4216 |
| sun's | 0.728 | 20816 |
| turbines | 0.718 | 14713 |
| energy-efficient | 0.716 | 24948 |
| turbine | 0.711 | 13697 |
| gas-fired | 0.711 | 70372 |
| energy | 0.710 | 453 |
| heaters | 0.708 | 15430 |
| cogeneration | 0.694 | 76666 |
| inverters | 0.693 | 49071 |
| energy-saving | 0.693 | 35516 |
| high-efficiency | 0.686 | 53165 |