What's the noun for fundie? Here's the word you're looking for.
fundamentalist
One who reduces religion to strict interpretation of core or original texts.
(finance) A trader who trades on the financial fundamentals of the companies involved, as opposed to a chartist or technician.
(Christian) Originally referred to an adherent of an AmericanChristian movement that began as a response to the rejection of the accuracy of the Bible, the alleged deity of Christ, Christ's atonement for humanity, the virgin birth, and miracles.
(pejorative) A fundamentalist Christian (also fundie or fundy)
“Pace and positioning, those two fundaments upon which the Azzurri have constructed their defensive abstinence, will do for starters.”
“Most of these nations base the fundaments of their society on their religion, and try to live by it every day.”
“Ziolkowsky began as a science fiction writer in the late 1800s, but later laid down some of the fundaments of rocket propulsion that are still used today.”