wildly excessive or irrational devotion, dedication, or enthusiasm
WordReference Random House Unabridged Dictionary of American English © 2025
fa•nat•i•cism
(fə nat′ə sīz′əm),USA pronunciation n.
- fanatical character, spirit, or conduct.
- fanatic + -ism 1705–15
Collins Concise English Dictionary © HarperCollins Publishers::
'fanaticism' also found in these entries (note: many are not synonyms or translations):