harmoniousness vs consonance

harmoniousness and consonance both are nouns.

Word	Noun	Adjective	Verb	Adverb
harmoniousness	Yes	No	No	No
consonance	Yes	No	No	No

As nouns, harmoniousness and consonance are synonyms defined as:

harmoniousness (noun)	consonance (noun)
compatibility in opinion and action	the property of sounding harmonious
the property of sounding harmonious	the repetition of consonants (or consonant patterns) especially at the ends of words