n.
1.
Dissimilarity, variation, diversity, disparity, dissimilitude, divergence, deviation, contrariety, contrast, disagreement.
2.
Disagreement, variance, alienation, misunderstanding, dissension, jarring, breach, rupture, schism, contest, contention, quarrel, dispute, debate, controversy, altercation, bickering, wrangle, strife, falling out.
3.
Distinction, discrimination.
4.
Remainder ( after subtraction ), amount of inequality.