Psion
Adventurer
Build is actually crpg terminology, especially in games like WoW. Somehow it got carried over to pen and paper rpgs from people who played both.
I've heard of builds in this context (and in the "pre-planned character design in D&D" context.) It's easy to see how one can leap to building from there, but that word was already being used.

Personally I'd like to keep it out of pen and paper rpgs, because of that distinction.
Along with toons.
