convergence has 4 distinct synonyms spread across 3 of its 4 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 divergence.
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 approach of an infinite series to a finite limit
a representation of common ground between theories or phenomena
“there was no overlap between their proposals”
the act of converging (coming closer)
Synonyms, antonyms and the broader and narrower relations for convergence come from Princeton University’s WordNet. Full sources and licences.