computer simulation has 1 distinct synonym spread across 1 of its 1 sense. 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
(computer science) the technique of representing the real world by a computer program
“a simulation should imitate the internal processes and not merely the results of the thing being simulated”
Synonyms, antonyms and the broader and narrower relations for computer simulation come from Princeton University’s WordNet. Full sources and licences.