compare vs alikeness

compare and alikeness both are nouns.

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

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

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

Other hypernyms of compare include likeness, similitude.

compare (noun)	alikeness (noun)
qualities that are comparable	similarity in appearance or character or nature between persons or things

compare (verb)	alikeness (verb)
examine and note the similarities or differences of
consider or describe as similar, equal, or analogous
to form the comparative or superlative form on an adjective or adverb
be comparable