Utopia vs imaginary place

Utopia and imaginary place both are nouns.

Word	Noun	Adjective	Verb	Adverb
Utopia	Yes	No	No	No
imaginary place	Yes	No	No	No

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

Utopia: an imaginary place considered to be perfect or ideal
imaginary place: a place that exists only in imagination; a place said to exist in fictional or religious writings

Other hypernyms of Utopia include fictitious place, mythical place.

Utopia (noun)	imaginary place (noun)
an imaginary place considered to be perfect or ideal	a place that exists only in imagination; a place said to exist in fictional or religious writings
a book written by Sir Thomas More (1516) describing the perfect society on an imaginary island