In fact, the problem is not as simple as I initially thought, because the sources disagree between themselves, for example:
- In Wikipedia, wardrobe is a subset of closet:
A small closet used for storing clothes.
A wardrobe or armoire or almirah is a standing closet used for storing clothes.
The name of wardrobe was then given to a room in which the wall-space was filled with closets and lockers, the drawer being a comparatively modern invention. (No bibliographic citation)
- In the Collins dictionary, it's the opposite:
A wardrobe is sometimes built into the wall of a room, rather than being a separate piece of furniture.
In American English, a built-in wardrobe is called a closet.
Wardrobe
A tall cupboard in which you hang your clothes
A wardrobe is also a piece of furniture where clothes are kept.
Closet
A cupboard or a small room with a door, used for storing things, especially clothes
A small room or space in a wall where you can store things such as clothes, sheets, etc., often having a door so that it can be closed
Finally, if someone would ever go deeper for this, there's this link where the person really did the homework and investigated further.
TLDR: Sources don't say exactly the same thing, specially wikipedia, there's also cupboards in the mix, in a way that wardrobes are just a large version of those. Any ideas for implications or aliases, or should we keep it as it is?