homogeneity 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 heterogeneity.
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.
the quality of being similar or comparable in kind or nature
“there is a remarkable homogeneity between the two companies”
the quality of being of uniform throughout in composition or structure
Synonyms, antonyms and the broader and narrower relations for homogeneity come from Princeton University’s WordNet. Full sources and licences.