12-letter words containing ash
- washing soda — sodium carbonate (def 2).
- washingtonia — either of two fan palm species from the genus Washingtonia
- water splash — a place where a stream runs over a road
- white-washed — a composition, as of lime and water or of whiting, size, and water, used for whitening walls, woodwork, etc.
- whitewashing — Present participle of whitewash.