obscurity has 3 distinct synonyms spread across 2 of its 3 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 2 recorded opposites are clarity, prominence.
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 unclear or abstruse and hard to understand
an obscure and unimportant standing; not well known
“he worked in obscurity for many years”
Synonyms, antonyms and the broader and narrower relations for obscurity come from Princeton University’s WordNet. Full sources and licences.
the state of being indistinct or indefinite for lack of adequate illumination