equivalence vs alikeness

equivalence and alikeness both are nouns.

Word	Noun	Adjective	Verb	Adverb
equivalence	Yes	No	No	No
alikeness	Yes	No	No	No

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

equivalence: qualities that are comparable
alikeness: similarity in appearance or character or nature between persons or things

Other hypernyms of equivalence include likeness, similitude.

equivalence (noun)	alikeness (noun)
qualities that are comparable	similarity in appearance or character or nature between persons or things
essential equality and interchangeability
a state of being essentially equal or equivalent; equally balanced