No, Strength is the antonym of Weakness.
Vice is the antonym of virtue.
Yes in terms of ethics, the opposite of virtue is weakness which i believe is also a synonym of Vice
Virtue
Weakness
powerless or weakness
(according to google) vice or inquity.
A fault is a flaw or a disadvantage. An antonym for fault would be virtue, advantage, asset, merit, or strength.
The word force in some contexts could have weakness as an antonym.
helplessness, powerlessness, relinquishment,renouncement, weakness
corruption, disgrace, dishonesty, dishonor
offense offense
Sinew means strength. It also means vigor, vitality, power, and potency. With, its antonym is impotency, or weakness, or disability, or powerlessness.