| Similarity | Rank | |
|---|---|---|
| prehistoric | 0.964 | 22958 |
| Neolithic | 0.847 | 43645 |
| prehistory | 0.840 | 66138 |
| megalithic | 0.827 | 94686 |
| ancient | 0.817 | 2250 |
| Prehistoric | 0.813 | 79408 |
| pre-Columbian | 0.802 | 84702 |
| petroglyphs | 0.798 | 77611 |
| archeological | 0.783 | 33105 |
| archaeological | 0.779 | 15673 |
| civilisations | 0.769 | 60506 |
| fossils | 0.762 | 23150 |
| millenia | 0.761 | 80184 |
| well-preserved | 0.761 | 59075 |
| ruins | 0.754 | 9898 |
| Paleolithic | 0.751 | 60944 |
| Pleistocene | 0.750 | 71860 |
| Archaic | 0.749 | 81589 |
| mammoths | 0.745 | 92970 |
| civilisation | 0.742 | 28525 |
| antiquity | 0.738 | 25157 |
| fossilized | 0.736 | 60659 |
| 000-year-old | 0.735 | 91455 |
| civilizations | 0.735 | 19966 |
| caves | 0.731 | 13377 |