socialism has 1 distinct synonym spread across 1 of its 2 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is capitalism.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a political theory advocating state ownership of industry
an economic system based on state ownership of capital
Synonyms, antonyms and the broader and narrower relations for socialism come from Princeton University’s WordNet. Full sources and licences.