Did you mean: since sings sins sing sink songs sines sons ?
| 鼻窦 | bí dòu | paranasal sinus |
| 窦 | dòu | (literary) hole; aperture / (anatomy) cavity; sinus |
| 额窦 | é dòu | frontal sinus |
| 窦道 | dòu dào | sinus (anatomy) / subterranean passage |
| 鼻旁窦 | bí páng dòu | paranasal sinus |
| 蝶窦 | dié dòu | sphenoidal sinus |