fairyland vs fictitious place

fairyland and fictitious place both are nouns.

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

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

fairyland: the enchanted realm of fairies
fictitious place: a place that exists only in imagination; a place said to exist in fictional or religious writings

Other hypernyms of fairyland include imaginary place, mythical place.

fairyland (noun)	fictitious place (noun)
something existing solely in the imagination (but often mistaken for reality)	a place that exists only in imagination; a place said to exist in fictional or religious writings
the enchanted realm of fairies