Adding my cent's worth! Or "penny" I should say as a Brit ;-)
I have seen the word "audism" being used to describe:
- socioeconomic oppression
- acts of discrimination against a deaf person
- an internalized negative belief on deafness held by an individual
While deaf people cannot oppress the hearing population as a whole, they are capable of (2.)acting cruelly against an individual hearing person and (3.)can have negative internalized beliefs about hearing people. I see that in the OP an attempt to clarify the difference by reserving the word "oppression" for the socioeconomic arena, and using the word "rejection" when individuals are involved.
IMO I think it is important to differentiate between social-political-economic oppression and individual rejection. But the words we have to hand don't easily make the distinction. And the pain is just as real for a person whether it comes from socioeconomic injustice or an individual's prejudice. Having hearing doesn't protect a person from pain, even if it protects them from audism.