Wiktionary
irrationalist
n. 1 One who is irrational in their beliefs or ideas. 2 Someone who rejects some aspect of rationalism.
Usage examples of "irrationalist".
I love them if only because irrationalists are willing to pin so many garbage-filled theories on them, whereas I see them only for what they are -coincidences.
She took comfort from the fact that they were few, those misfits, misanthropes, technophobes, romantics, irrationalists of every kind.