What's the adjective for fanaticism? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs fanaticize and fanaticise which may be used as adjectives within certain contexts.
“But even the most fanatic follower of the faithless moves fanatically as a consequence of his own radical skepticism.”
“I know it is difficult to imagine this miser, this money-grubber of unmitigated meanness, as the fanatic fan of the most romantic figure in perhaps all of English fiction.”