| Similarity | Rank | |
|---|---|---|
| safer | 0.791 | 6064 |
| safest | 0.756 | 13513 |
| safely | 0.729 | 4406 |
| Safe | 0.713 | 8726 |
| risk-free | 0.681 | 27353 |
| secure | 0.674 | 1865 |
| worry-free | 0.655 | 65017 |
| convenient | 0.630 | 3529 |
| precautions | 0.622 | 11507 |
| hygienic | 0.621 | 32574 |
| unsafe | 0.621 | 12153 |
| safety | 0.619 | 996 |
| drug-free | 0.619 | 53650 |
| precaution | 0.616 | 22006 |
| stress-free | 0.611 | 33121 |
| reliable | 0.595 | 2758 |
| comfortable | 0.592 | 1458 |
| non-toxic | 0.588 | 28141 |
| foolproof | 0.586 | 39969 |
| well-ventilated | 0.586 | 96510 |
| dangerous | 0.584 | 2183 |
| nontoxic | 0.580 | 63903 |
| sane | 0.580 | 16915 |
| safeguarded | 0.578 | 41054 |
| trouble-free | 0.573 | 45649 |