| Similarity | Rank | |
|---|---|---|
| drilling | 0.824 | 8037 |
| fracking | 0.750 | 21463 |
| shale | 0.747 | 17984 |
| refiners | 0.728 | 67379 |
| fracturing | 0.720 | 29911 |
| oilfield | 0.716 | 56572 |
| mining | 0.710 | 4846 |
| oilsands | 0.709 | 96475 |
| rigs | 0.709 | 20578 |
| Drilling | 0.703 | 33103 |
| coal | 0.703 | 5233 |
| Shale | 0.700 | 29866 |
| geologists | 0.699 | 43890 |
| Bakken | 0.695 | 53247 |
| oilfields | 0.694 | 98378 |
| refineries | 0.692 | 30816 |
| mines | 0.691 | 10663 |
| pipelines | 0.688 | 21092 |
| smelters | 0.675 | 94259 |
| drill | 0.674 | 7228 |
| contractors | 0.674 | 5882 |
| welders | 0.669 | 55646 |
| hydraulic | 0.666 | 13689 |
| Marcellus | 0.664 | 34448 |
| wells | 0.663 | 9680 |