What does "fanatical" mean?

Having an extreme, irrational zeal or enthusiasm for a specific cause.

What is a synonym for "fanatical"?

Common synonyms include: overzealous, agog, ardent, ardent, at fever pitch, authoritarian.

Pronounced //fəˈnætɪkəl//.

/fəˈnætɪkəl/ adj

adj ·Moderate ·High school level

Adjective

1
Having an extreme, irrational zeal or enthusiasm for a specific cause.
"fanatical devotion"

Adjective

1
marked by excessive enthusiasm for and intense devotion to a cause or idea wordnet

"They are fanatical in their beliefs."