Extravaganza vs Festival - What's the difference?

As nouns the difference between extravaganza and festival

is that extravaganza is an event or display (dramatic, musical, etc) of fantastic or chaotic behaviour or conduct while festival is .

(en-noun)

An event or display (dramatic, musical, etc.) of fantastic or chaotic behaviour or conduct.

(wikipedia festival)

(en adjective)

Pertaining to a feast or feast-day. (Now only as the noun used attributively.)

* 1590 , Edmund Spenser, The Faerie Queene , II.iii:

the temple of the Gods [...] / Whom all the people decke with girlands greene, / And honour in their festiuall resort [...].

(en noun)

An event or community gathering, usually staged by a local community, which centers on some theme, sometimes on some unique aspect of the community.

In mythology, a set of celebrations in the honour of a god.