Learn English – single word for “The excitement and enthusiasm at the beginning of a new job/romance” etc.

"would also be fine with me to coin a new word". My friend is a grad student in architecture. He tells me that both students and teachers pride themselves on making up words that no one notices were just made up. lol, so my suggestion is to make something up. Maybe innercore.

Maybe just core. although not made up, it would contradict Interface well.

Things that flow well in conversation (with Interface).

• Personal Space (though not one word)
• Control or Controlled Space (from Andrews comments)
• Innerspace (as suggested by Matt)
• Intraspace (as suggested by Andrew)

But personally I like core best.

Where racism is a move from specific to general, discrimination is a move from the more general to the more specific.

discrimination 3. Treatment or consideration based on class or category rather than individual merit; partiality or prejudice

This means that prejudices held by an individual towards a group are transferred onto a single individual without regards to his individual merits. Of course, discrimination has a more general sense (as does racism) but according to your dichotomy, it fits the movement from general prejudice to individual prejudice.