dissonance vs cacophony

dissonance and cacophony both are nouns.

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

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

Other hyponyms of dissonance include discord, discordance, disharmony, inharmoniousness.

dissonance (noun)	cacophony (noun)
disagreeable sounds	loud confusing disagreeable sounds
the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience	a loud harsh or strident noise
a conflict of people's opinions or actions or characters