How WC Differs From Other Toilet Terms 
Let’s clear up some quick differences between all the restroom-related words we hear today:
Toilet
Refers to the actual bowl or the room — depending on the region.
Restroom
Commonly used in the US, emphasizing the room rather than the fixture.
Bathroom
Can refer to a room with a bath or shower (especially in households).
Loo
A friendly British slang term.
WC
A traditional, widely recognizable abbreviation used in public spaces worldwide.
Each has its own cultural flavor, but WC stands out because of its international reach.
Final Thoughts: A Small Sign With a Big History 

The next time you see the familiar WC sign while traveling or wandering around town, you’ll know you’re actually looking at a piece of history — a reminder of how far public sanitation and indoor plumbing have come.
Most public toilets have a ‘WC’ sign outside, but no one seems to know what it means until they dig into the history. Now you do!