Ugh. That would just make a huge headache for fans and non-fans alike.
Uhh...how so?
The major Spidey titles that most "layman" Marvel fans hear of are Amazing, Spectacular and Sensational, which are all synonyms of each other.
Just numbering sequels is a bit lame, but at least the convention has a purpose. How the hell would you keep track of or know which film comes before what if they used the titles instead? All three adjectives describe Spider-Man in the same way, so how exactly does it relate to the plot if they're practically identical in meaning? It'd be a fucking nightmare for everyone.
What, are people retarded? If that would be a nightmare for people to figure out, we might as well close all the schools now and live like animals. Seriously, the mind set your describing is that of a totally lobotomized grade schooler.