furor

1. A general commotion; public disorder or uproar.
2. Violent anger; frenzy.
3. A fashion adopted enthusiastically by the public; a fad.
4. A state of intense excitement or ecstasy.

[Middle English furour, wrath, fury, from Old French fureur, from Latin furor, from furere, to rage.]

noun

1. Violent or unrestrained anger: fury, irateness, ire, rage, wrath, wrathfulness. See feelings.
2. The current custom: craze, fad, fashion, mode, rage, style, trend, vogue. Informal thing. Idioms: the in thing, the last word, the latest thing. See style/good style/bad style, usual/unusual.

Definition: disturbance, excitement
Antonyms: calm, peace

Tutor's tip: Because of the negative inference, it usually causes a "furor" (a rage; an uproar) if a politician is referred to as a "fuhrer." (leader; the title used by Adolf Hitler, dictator of Nazi Germany)

The noun has 2 meanings:

Meaning #1: an interest followed with exaggerated zeal
  Synonyms: fad, craze, furore, cult, rage

Meaning #2: a sudden outburst (as of protest)
  Synonym: furore