imagine vs fantasy

imagine is not a noun while fantasy is a noun.

Word	Noun	Adjective	Verb	Adverb
imagine	No	No	Yes	No
fantasy	Yes	No	Yes	No

As verbs, fantasy is a hyponym of imagine; that is, fantasy is a word with a more specific, narrower meaning than imagine:

imagine: form a mental image of something that is not present or that is not the case
fantasy: indulge in fantasies

imagine (noun)	fantasy (noun)
	imagination unrestricted by reality
	something many people believe that is false
	fiction with a large amount of imagination in it

imagine (verb)	fantasy (verb)
expect, believe, or suppose	indulge in fantasies
form a mental image of something that is not present or that is not the case