Disagreement, n.
Etymology: [Cf. F. désagrément disagreeable circumstance, disagreeableness.]
1. The state of disagreeing; a being at variance; dissimilitude; diversity.
2. Unsuitableness; unadaptedness. [R.]
3. Difference of opinion or sentiment.
4. A falling out, or controversy; difference.
1 more senses
Syn. -- Difference; diversity; dissimilitude; unlikeness; discrepancy; variance; dissent; misunderstanding; dissension; division; dispute; jar; wrangle; discord.
Shades of meaning
Fernald has no entry of its own for disagreement; he lists it under difference.
Where he writes about it:
Disagreement is not merely the lack, but the opposite, of agreement; it is a mild word for opposition and conflict; difference is sometimes used in the same sense. — from difference