| Related synonyms for soil in Welsh |
 | grease | saim (m) |
| Generic synonyms for soil in Welsh |
 | change | amnewid |
 | earth | daear (f) |
| Specialized synonyms for soil in Welsh |
 | mud | llaca (m); llaid (m); llwtra (m) |
 | sand | tywod (m) |
 | till | tan |
| Derivative terms for soil in Welsh |
 | grease | saim (m) |