| thickening agent | 0.46 | Pan sauces need a thickening agent. | ||
| thickening cloud | 0.26 | Thickening clouds and advancing showers will temper the warming trend. | ||
| thickening fog | 0.26 | A thickening fog shrouds Edinburgh Castle. | ||
| thickening veil | 0.26 | Morning sunshine will fade rapidly behind a thickening veil of clouds across the Eastern States. |