Restroom is a synonym of washroom.
As nouns the difference between washroom and restroom
is that washroom is a toilet, especially a public one while restroom is a public room containing a toilet.
washroom
English
Noun
(
en noun)
(US, Canada) A toilet, especially a public one.
Usage notes
*In the U.S., where the term originated, it was mostly replaced by "restroom" in the 20th century. Today it is generally used only as a technical or commercial term.
*In Canada, the term is used in everyday speech. The word "bathroom" is also used. The term "toilet" is generally considered somewhat indelicate in Canada and is avoided.
*The term is rarely used in other English-speaking countries, where "public toilet" or "lavatory" are preferred.
restroom
English
Alternative forms
* rest room
Noun
(
en noun)
(US) A public room containing a toilet.
- Could you tell me where I can find the restroom?
Synonyms
* washroom (Canada)
* WC, lavatory (Britain)