make-believe vs imaging

make-believe and imaging both are nouns.

Word	Noun	Adjective	Verb	Adverb
make-believe	Yes	Yes	No	No
imaging	Yes	No	No	No

As nouns, imaging is a hypernym of make-believe; that is, imaging is a word with a broader meaning than make-believe:

Other hypernyms of make-believe include imagery, imagination, mental imagery.

make-believe (noun)	imaging (noun)
the enactment of a pretense	(medicine) obtaining pictures of the interior of the body
imaginative intellectual play	the ability to form mental images of things or events

make-believe (adjective)	imaging (adjective)
imagined as in a play