argumentI don't want to get into an argument with you about this.
disagreementThere was a disagreement over who should pay the bill.
quarrelThere were bitter quarrels between the two neighbours.
rowmainlyUKMy parents had a row about money.
squabbleI'm always dealing with squabbles between the children.
tiffinformalShe had a tiff with her boyfriend last night.
a difference of opinionThere was a slight difference of opinion over whose turn it was to wash up.
disputeHe was involved in a bitter dispute with his employer.
feudThere was a long-running family feud between the brothers.
conflictViolence isn't a good way to resolve a conflict.