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.
Anarchists hold different views as to the economic and legal organisation of society; some favour collectivist anarchism, anarcho-syndicalism or participatory economics while others support market...
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".