mirror image vs alikeness

mirror image and alikeness both are nouns.

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

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

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

Other hypernyms of mirror image include likeness, similitude.

mirror image (noun)	alikeness (noun)
a likeness in which left and right are reversed	similarity in appearance or character or nature between persons or things