carnival vs funfair

carnival and funfair both are nouns.

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

As nouns, carnival and funfair are synonyms defined as:

carnival and funfair: a traveling show; having sideshows and rides and games of skill etc.

Other synonyms of carnival include fair.

carnival (noun)	funfair (noun)
a festival marked by merrymaking and processions	a traveling show; having sideshows and rides and games of skill etc.
a traveling show; having sideshows and rides and games of skill etc.	a commercially operated park with stalls and shows for amusement
a frenetic disorganized (and often comic) disturbance suggestive of a large public entertainment