To expand, positional definition of adjectives tends to be a bad marketing scheme.
Nobody knows that pro and max mean specific things.
If AMD needs to create a full cross-product of their hardware feature set, because they intend to have a SKU for every possible combination, they probably need a better scheme.
Say what you want about Celeron/Pentium/i3/i5/i7, but it mostly got the idea across (except on the occasions Intel hijacked it to upbrand SKUs).