conformity has 8 distinct synonyms spread across 5 of its 5 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 nonconformity.
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.
correspondence in form or appearance
acting according to certain accepted standards
“their financial statements are in conformity with generally accepted accounting practices”
orthodoxy in thoughts and belief
concurrence of opinion
“we are in accord with your proposal”
Synonyms, antonyms and the broader and narrower relations for conformity come from Princeton University’s WordNet. Full sources and licences.