Isn't KISS related to intuition in some way ?
Yes but not to your personal intuition.
Well of course it is correct name, but I mean 90% of people (especially non-native english speakers) just never ever use "return name", most of them doesn't even know what is return key. Historically it was return, but these days it is basically known as enter I'd say. I am yet to see keyboard with "return" name on that key. Or a game/application that says "press return to open chat". Anyway, it doesn't matter. Return is okay name, enter just in my opinipn would be a bit more intuitive.
This is again just your opinion and your made up numbers (90%) (unless your God and know how everyone is thinking and how their knowledge level of 'return' is).
Fact is that many keyboard layouts don't write down Enter or Return but just leave the edged back arrow on the key. Another fact is that mostly all Apple keyboards have the return naming (I think they still handle Enter and Return diffrently).
It just boils down to personal preferences and from my point of view I haven't seen Enter being way more used than Return and thus I feel like they're equal but as I said in the first post if it was my decision I'd probably also choose Enter.