Probably "best friend".
An antonym of the word Ally is Enemy.
Antonyms for the word "enemy" include:friendallyally friendconfederatehelper
enemy, foe, stranger
Anonymous mean opposite meaning friend or companion mean eneny
Antagonist, protester, assailant, opposition, enemy...
An antonym for the word 'worst' is 'best'.
An antonym of the word Ally is Enemy.
his worst enemy is john cena
enemy
Worst
worst
Antonyms for the word "enemy" include:friendallyally friendconfederatehelper
Rey Mysterio's worst enemy is Batista.
i think tenten is the worst in naruto enemy .
king Solomon's worst enemy was called Jeroboam.
Worst and best are each other's antonyms.
My Own Worst Enemy - album - was created in 2003.