paradigm has 4 distinct synonyms spread across 2 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. 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.
systematic arrangement of all the inflected forms of a word
the class of all items that can be substituted into the same position (or slot) in a grammatical sentence (are in paradigmatic relation with one another)
the generally accepted perspective of a particular discipline at a given time
“he framed the problem within the psychoanalytic paradigm”
Synonyms, antonyms and the broader and narrower relations for paradigm come from Princeton University’s WordNet. Full sources and licences.