dissonance vs disunity

dissonance and disunity both are nouns.

Word	Noun	Adjective	Verb	Adverb
dissonance	Yes	No	No	No
disunity	Yes	No	No	No

As nouns, disunity is a hyponym of dissonance; that is, disunity is a word with a more specific, narrower meaning than dissonance:

Other hyponyms of dissonance include divide.

dissonance (noun)	disunity (noun)
disagreeable sounds	lack of unity (usually resulting from dissension)
the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience
a conflict of people's opinions or actions or characters