WordNet records no synonym and no antonym for subornation of perjury. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
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.
(law) inducing someone to make a false oath as part of a judicial proceeding
“to prove subordination of perjury you must prove the perjury and also prove that the perjured statement was procured by the accused suborner who knew that it would be false”
Synonyms, antonyms and the broader and narrower relations for subornation of perjury come from Princeton University’s WordNet. Full sources and licences.