phantasy world vs fantasy

phantasy world and fantasy both are nouns.

Word	Noun	Adjective	Verb	Adverb
phantasy world	Yes	No	No	No
fantasy	Yes	No	Yes	No

As nouns, fantasy is a hypernym of phantasy world; that is, fantasy is a word with a broader meaning than phantasy world:

phantasy world: something existing solely in the imagination (but often mistaken for reality)
fantasy: imagination unrestricted by reality

Other hypernyms of phantasy world include phantasy.

phantasy world (noun)	fantasy (noun)
something existing solely in the imagination (but often mistaken for reality)	imagination unrestricted by reality
	something many people believe that is false
	fiction with a large amount of imagination in it

phantasy world (verb)	fantasy (verb)
	indulge in fantasies