uniformity 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 nonuniformity.
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 condition in which everything is regular and unvarying
the quality of lacking diversity or variation (even to the point of boredom)
Synonyms, antonyms and the broader and narrower relations for uniformity come from Princeton University’s WordNet. Full sources and licences.