Word Study
sour note
THESAURUS
sour note
atonalism, atonality, cacophony, clinker, discord, discordance, discordancy, disharmony, dissonance, dissonancy, dissonant chord, flatness, inharmoniousness, inharmony, off note, sharpness, sourness, stridor, tunelessness, unharmoniousness, unmusicality, untunefulness, wolfFor further exploring for "sour note" in Webster Dictionary Online