imaging vs dream

imaging and dream both are nouns.

Word	Noun	Adjective	Verb	Adverb
imaging	Yes	No	No	No
dream	Yes	No	Yes	No

As nouns, dream is a hyponym of imaging; that is, dream is a word with a more specific, narrower meaning than imaging:

imaging (noun)	dream (noun)
(medicine) obtaining pictures of the interior of the body	a series of mental images and emotions occurring during sleep
the ability to form mental images of things or events	imaginative thoughts indulged in while awake
	a fantastic but vain hope (from fantasies induced by the opium pipe)
	a state of mind characterized by abstraction and release from reality
	a cherished desire
	someone or something wonderful

imaging (verb)	dream (verb)
	have a daydream; indulge in a fantasy
	experience while sleeping