Using the definition 'fortification, support', antonyms would be 'weak link, weak point, weakness'. Check this page for an explanation: answers. com /topic/bulwark
The opposite (antonym) of antonym is synonym. An antonym is a word that means the opposite. A synonym is a word that means the same thing, or nearly the same thing, for a given context.
Some words do not have direct opposites [antonyms]. Antonyms do not usually substitute for phrases. The phrase "you are" has no antonym. A contrasting version of "you are" is "you are not".
