[2022] If knockback and knockup immunity are the same, every tooltip should be updated to include only one of these terms or one universal term

Well this is from 2018 and was clearly in response to some sort of context.

Knockbacks and knockups are the same type of cc and thus the same type of immunity but the direction and momentum applied can be different.

We tend to use knockback for hits that apply mostly horizontal movement. And knockup for mostly vertical.

Generally we tried to use knockback as the default term but then people complain that's it's inaccurate because many are used to knockup or the ability knocks more vertically.

I'd agree that the immunity text could be more consistent and all should say "knockback" because it is in fact the same immunity.

As for other interactions and applications it tends to use the one that's most accurate or relevant. For example. Awilix pull only cares about elevation. It does not care how the enemy gods got there (as long as they aren't cc immune)

Well the ability mentions leaps. Which includes those underground travel abilities.

What awilix is really looking for is any sort of "leap" state or "rising" or "falling" states.

She cannot pull from banishes. All three of those ults are banishes.

Freya banish does drop enemies from the banish so there actually is a short fall that awilix can pull from