| Similarity | Rank | |
|---|---|---|
| rare | 0.818 | 2332 |
| rarer | 0.793 | 36361 |
| rarity | 0.749 | 23326 |
| rarities | 0.719 | 63844 |
| prized | 0.703 | 17712 |
| elusive | 0.672 | 14436 |
| Rare | 0.669 | 21385 |
| collectable | 0.644 | 56521 |
| collectible | 0.628 | 27451 |
| finest | 0.625 | 4298 |
| collector's | 0.620 | 41830 |
| uncommon | 0.620 | 8857 |
| hard-to-find | 0.616 | 59600 |
| sought-after | 0.614 | 27275 |
| jewel | 0.612 | 16210 |
| lesser-known | 0.611 | 44413 |
| endangered | 0.610 | 11588 |
| treasured | 0.598 | 18218 |
| exotic | 0.598 | 6734 |
| best-known | 0.597 | 26832 |
| costliest | 0.591 | 75266 |
| undiscovered | 0.589 | 34706 |
| most | 0.589 | 102 |
| extinct | 0.586 | 18328 |
| collectors' | 0.585 | 88355 |