A look into the different dictionaries for the definition of “opposition” supplies the following meanings:
A. The connection between two propositions with a similar subject and predicate, but with a difference in quantity or quality or both.
B. An act or process of taking a contrary stance or position to a condition, action, plan, or person.
She spoke in opposition to taking the train.
C. A hostile, aggressive, or antagonistic to an action or condition.
He offered strong Opposition to his father’s proposition.
D. Someone or group of people opposing something, someone, plan, cause, etc.
Antonym of opposition
Words that can be described as the opposite of opposition include agreement, yielding, acquiescence, apposition, retreat, surrender, sympathy, compatibility, team, accord, affection, agreement, harmony, obedience.
Some words from the collection of antonyms of opposition can be by usage primarily considered the opposite of opposition.
The words are agreement, yielding, acquiescence, and apposition.
Agreement means an understanding between persons or parties to adopt a specific course, plan, or action.
An agreement was reached by the warring factions.
Yielding means to be inclined or to submit to pressure.
After hours of debating, she began yielding to his requests.
Acquiescence means a passive accent or acceptance.
He has her acquiescence to act on her behalf as he deems fit.
Apposition indicates the quality of being side-by-side. To be apposed rather than being opposed.
In “my brother the Attorney,” the “Attorney” is in apposition to “my brother.”