wonderland vs fictitious place

wonderland and fictitious place both are nouns.

Word	Noun	Adjective	Verb	Adverb
wonderland	Yes	No	No	No
fictitious place	Yes	No	No	No

As nouns, fictitious place is a hypernym of wonderland; that is, fictitious place is a word with a broader meaning than wonderland:

wonderland: an imaginary realm of marvels or wonders
fictitious place: a place that exists only in imagination; a place said to exist in fictional or religious writings

Other hypernyms of wonderland include imaginary place, mythical place.

wonderland (noun)	fictitious place (noun)
an imaginary realm of marvels or wonders	a place that exists only in imagination; a place said to exist in fictional or religious writings
a place or scene of great or strange beauty or wonder