Skeptics' jargon. "The term comes from "woo-woo", an epithet used in the 1990s by science and skeptical writers to ridicule people who believe or promote such things. This is in turn believed to have come from the use of "woooooo!" as a reaction to dimmed lights or magic tricks, and generally implies a lack of either intelligence or sincerity on the part of the person or concepts so described." - supposedly.
You see, I've seen the word "rationalism" used to mean all five of these things at different times:
Edited to reinstate that proposed solution, since this discussion is presumably finished.