mirror image vs likeness

mirror image and likeness both are nouns.

Word	Noun	Adjective	Verb	Adverb
mirror image	Yes	No	No	No
likeness	Yes	No	No	No

As nouns, likeness is a hypernym of mirror image; that is, likeness is a word with a broader meaning than mirror image:

mirror image: a likeness in which left and right are reversed
likeness: similarity in appearance or character or nature between persons or things

Other hypernyms of mirror image include alikeness, similitude.

mirror image (noun)	likeness (noun)
a likeness in which left and right are reversed	picture consisting of a graphic image of a person or thing
	similarity in appearance or character or nature between persons or things