fanatical
AdjectiveWordNet 3.0
Adjective (1)
- marked by excessive enthusiasm for and intense devotion to a cause or idea“rabid isolationist”Synonyms: fanaticoverzealousrabid
Webster's Dictionary (GCIDE)
Fanatical \Fa*nat"ic*al\, a. Characteristic of, or relating to, fanaticism; fanatic. -Fa*nat"ic*al*ly, adv. -- Fa*nat"ic*al*ness, n. [1913 Webster]