| A | B |
| Sympathy | The act of feeling the same emotions as another person |
| Synagogue | A place where Jewish worshippers meet |
| Syndicate | A body of business people working together |
| Synthetic | Formed together from artifical parts; not genuine |
| Symbiosis | the living together in close association of two different organisms |
| Symmetry | Having the same shape on both sides of a dividing line |
| Symptom | A condition indicting a particular disease |
| Symposium | A gathering together for the purpose of discussing a particular topic |
| Synonym | A word having hte same meaning as another word |
| Photosynthesis | The coming together of light and chemicals to produce green growth in a plant |