wishful thinking vs fantasy

wishful thinking and fantasy both are nouns.

Word	Noun	Adjective	Verb	Adverb
wishful thinking	Yes	No	No	No
fantasy	Yes	No	Yes	No

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

Other hypernyms of wishful thinking include fancy, illusion, phantasy.

wishful thinking (noun)	fantasy (noun)
the illusion that what you wish for is actually true	imagination unrestricted by reality
	something many people believe that is false
	fiction with a large amount of imagination in it

wishful thinking (verb)	fantasy (verb)
	indulge in fantasies