An adversary is someone opposed to you or in opposition to you. Therefore, adversary has a similar meaning to "enemy". Therefore, "adversary" is a synonym to the word "enemy", but is not an antonym for "enemy".
Antonyms for enemy would be:
Example sentence:
The United States and France were allies against their common enemy, the German troops, during World War II.
Enemy , antagonist are several synonyms . Also; opponent, rival, competitor, foe, contestant
An antonym for alert would be notify or inform.
The antonym word for Ratlines would be Disratlines
A close antonym would be shrinkage.
The antonym (opposite) of opposite would be same, similar, or alike.
Anonymous mean opposite meaning friend or companion mean eneny
An adversary is an enemy or someone who opposes someone else.
Adversary
opponent, foe, adversary
opposition
Synonyms for "adversary" include opponent, foe, antagonist, enemy, or rival.
adversary, rival, foe, opponent
An antonym of the word Ally is Enemy.
rival, adversary, opponent, enemy, contender
The base root for "adversary" is "advers-" which comes from the Latin word "adversarius," meaning opponent or enemy.
enemy
Antonyms for the word "enemy" include:friendallyally friendconfederatehelper