carnival vs fete

carnival and fete both are nouns.

Word	Noun	Adjective	Verb	Adverb
carnival	Yes	No	No	No
fete	Yes	No	Yes	No

As nouns, fete is a hypernym of carnival; that is, fete is a word with a broader meaning than carnival:

Other hypernyms of carnival include festival.

carnival (noun)	fete (noun)
a festival marked by merrymaking and processions	an organized series of acts and performances (usually in one place)
a traveling show; having sideshows and rides and games of skill etc.	an elaborate party (often outdoors)
a frenetic disorganized (and often comic) disturbance suggestive of a large public entertainment

carnival (verb)	fete (verb)
	have a celebration