Roman Catholics have a curious word for evangelism — “evangelization,” as in the “new evangelization” advocated by Papa Benny and now by Francis. You see, Catholics have started to realize that the old state-supported, culturally-driven option for a viable Catholicism is no longer a viable option. The “new evangelization” is the Vatican’s attempt to get Catholics off their arses and tell people about Jesus, though it is purportedly more subtle and sophisticated than that. Francis is not very fond of proselytism, for example, which is one reason (among many) why conservative Catholics are less-than enamored by the current pontiff. Of course, Francis doesn’t define what he means by proselytism, since his goal is to be the most ambiguous pope in papal history.
For most of us, the only noun form of “to evangelize” is “evangelism.” A cursory glance at a Google search would indicate that evangelization is a Catholic term. The first search result for “evangelization” is the USCCB, and nearly all of the subsequent results are Catholic websites. However, the OED tells us that “evangelization” occurs as early as Hobbe’s Leviathan in 1651. But for all intents and purposes, it appears to be a new usage, if not coinage, by Roman Catholics in recent years.
I do not know if there is any difference between “evangelization” and “evangelism.” It seems to just be Catholic-speak for the same thing. However, their usage does appear to be different, given the different theologies and histories behind the two terms. For Catholic “evangelization,” the renewal of the culture is a big ingredient and, indeed, the telos of the whole initiative. For Protestant “evangelism,” the conversion of individuals is the primary connotation, whereas this appears to be secondary in Catholic discourse. Even among Protestants who embrace the “worldview” mentality of “every square inch,” the term “evangelism” is still mostly reserved for the act of witnessing to the gospel in its proclamation to the lost.
The term, “evangelization,” has become so widespread in Catholic circles that it has become a sure-fire way to identify a Catholic. They don’t say, “evangelism,” but “evangelization.”