fanatic
//fəˈnætɪk//
Noun
fanaticSingular
fanaticsPlural
1
A person filled with excessive and single-minded zeal, especially for an extreme religious or political cause.
The political fanatic refused to listen to any opposing views.
2
A person with an obsessive enthusiasm or interest in a particular activity, subject, or hobby.
My brother is a fitness fanatic who goes to the gym every day.
Synonym
Antonym
Adjective
fanaticCanonical form
1
Filled with or expressing excessive zeal; fanatical.
His fanatic devotion to the cause worried his family.