interior vs internal

[fang2008]

Any difference between these two:

interior structure,
internal structure

Thanks

[colloquium]

They both have a very similar meaning; however one difference is that interior can be used as a noun or an adjective, but internal can only be used as an adjective.

The building's interior. (The inside of the building - a noun, a thing.)

However internal can only function as an adjective.

The building's internal. (incorrect - internal is not a thing/noun, only a feature/description of a thing.)

The building's internal space. (correct - here internal (an adjective) describes the space as being internal, not external.)


There is much more to be said on this topic.

Hopefully someone can elaborate on my suggestions.

I am not a teacher.