Discord

дисонанс

disonans

(music: an inharmonious combination of simultaneously sounded tones; a dissonance)

несъгласие

nesǎglasie

(lack of concord, agreement, harmony; disaccord)

раздо́р

razdór

(tension or strife resulting from a lack of agreement; dissension)

разногласие

raznoglasie

(lack of concord, agreement, harmony; disaccord)