http://en.wikipedia.org/wiki/Evangelicalism
Not to mention that there are even evangelical Catholics. (Mel Gibson comes to mind.)
As such, I would still maintain that they are not synonymous, not that it's really important to the discussion.
Did you even read the Wiki entry?
wiki said:Evangelicalism is a Protestant Christian movement[\b]
Protestants =/= Catholics. It's a particular branch of Christianity, not simply a broad term for Christians who preach their message. All Christianity is evangelical in that sense. So is Islam.