judgment has 13 distinct synonyms spread across 7 of its 7 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. 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.
the act of judging or assessing a person or situation or event
“they criticized my judgment of the contestants”
(law) the determination by a court of competent jurisdiction on matters submitted to it
the cognitive process of reaching a decision or drawing conclusions
the legal document stating the reasons for a judicial decision
“opinions are usually written by a single judge”
the capacity to assess situations or circumstances shrewdly and to draw sound conclusions
the mental ability to understand and discriminate between relations
Synonyms, antonyms and the broader and narrower relations for judgment come from Princeton University’s WordNet. Full sources and licences.