The Nostratic database, containing most existing etymologies from published sources (Illich-Svitych, Dolgopolski), plus a number of additions. Under heavy construction; all the reconstructed protoforms are highly provisional, but can be used for further research.
Correspondences of Nostratic affricates
| Nostr. | Alt | IE | Ur | Kartv |
| *c` | s | sk-, -s- | ć | c/ć (.) |
| *c`w | š | skw-, -s- | š-, č | c/ć (.) |
| *c | č` | sk-, s | ć | c/ć (.) |
| *cw | č | s | č ~ ć | c/ć (.) |
| *ʒ | ǯ | s | s/ś | ʒ/ʒ́/z/ź |
| *ʒw | ǯ | s(t) | š ~ ć | ʒ/ʒ́/z/ź |
| *z | z-, ǯ | s | s/ś | z/ź |
| *zw | z-, ǯ | st | ś | ? |
| *s | s | s | s/ś | s/ś |
| *sw | š | s | s/ś | s/ś |
| *č` | č`-, s | st | č~š | č (.) |
| *č`w | š | st- | č | č (.) |
| *č | č` | s(t)- | ć | č (.) |
| *čw | č | sw | s/ś | č |
| *ǯ | ǯ | st | č | ǯ |
| *š | s | s | š | š |
| *šw | š | | š | š |
| *ž | z | | š | ž |