They're distinct words that say exactly what they do. They're only hard to keep straight if you haven't taken a few minutes to understand the underlying concepts (and, in a field of complex and nuanced concepts, these are hardly the most difficult). Replacing widely-used terms with new not-quite-overlapping terms turns 2 things into 4 things and is not a solution to anything.

...the article is about the ambiguity of the word "auth". You're talking about something a bit different.

But I've found that when people have a hard time keeping authentication and authorization straight they are mostly having a problem distinguishing the concepts, not really the terms. I really doubt using alt terminology, which is also already heavily overloaded, is going to help.