Bathroom. Restroom. Water Closet. Loo. Bog. Khazi. John. Privy.
I wonder if other languages have such an array of words for a toilet, and how much confusion they cause for foreigners.
"Toilet" is also a euphemism, it's Middle French for a type of cloth.
So is "lavatory", it means wash room.
I can't think of a word that isn't vulgar or a euphemism.
"Toilet" was by etymology a euphemism, but is no longer understood as such. As old euphemisms have become the standard term, they have been progressively replaced by newer ones, an example of the euphemism treadmill at work.
Washroom. Lavatory. Outhouse. Mens' room. Little girls' room room. Potty. Half bath. And many more (mostly NSFHN).
I suspect there's a deep reason for all the different words, probably because of the basic nature of what goes on within such rooms. I wouldn't be surprised if other languages have the same profusion of synonyms.
Let me try in Spanish: servicio, baño, excusado, w.c, mingitorio, tigre (this is slang)
I'm serious, not a native speaker.
Brace yourself: in the US and from what I've seen of the UK, the toilet and the shower are in the same room.