Ladies' room and Wash room

Ladies' room noun - A woman's restroom in a public (or semipublic) building.

Wash room and ladies' room are semantically related. In some cases you can use "Wash room" instead a noun phrase "Ladies' room".

Wash room noun - A toilet that is available to the public.

Ladies' room and wash room are semantically related. Sometimes you can replace phrase "Ladies' room" with "Wash room", this phrases are similar.