Laputa vs fictitious place

Laputa and fictitious place both are nouns.

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

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

Laputa: a land imagined by Jonathan Swift where impractical projects were pursued and practical projects neglected
fictitious place: a place that exists only in imagination; a place said to exist in fictional or religious writings

Other hypernyms of Laputa include imaginary place, mythical place.

Laputa (noun)	fictitious place (noun)
a land imagined by Jonathan Swift where impractical projects were pursued and practical projects neglected	a place that exists only in imagination; a place said to exist in fictional or religious writings