| Similarity | Rank | |
|---|---|---|
| Cretaceous | 0.919 | 59402 |
| Triassic | 0.893 | 93483 |
| Holocene | 0.885 | 86928 |
| Devonian | 0.841 | 99765 |
| prehistoric | 0.793 | 22958 |
| hominids | 0.787 | 99822 |
| erectus | 0.785 | 90493 |
| fossils | 0.782 | 23150 |
| hominid | 0.779 | 82094 |
| extinctions | 0.777 | 71406 |
| Permian | 0.775 | 68603 |
| prehistory | 0.769 | 66138 |
| geologic | 0.767 | 35099 |
| sedimentary | 0.762 | 47805 |
| glacial | 0.758 | 30580 |
| mammoths | 0.752 | 92970 |
| pre-historic | 0.750 | 93508 |
| Neolithic | 0.749 | 43645 |
| Prehistoric | 0.741 | 79408 |
| Archaic | 0.738 | 81589 |
| permafrost | 0.738 | 59965 |
| sapiens | 0.736 | 45359 |
| sediments | 0.734 | 31409 |
| hunter-gatherers | 0.734 | 82808 |
| geological | 0.732 | 19326 |