WordNet records no synonym and no antonym for divestiture. It is the only member of each of its synsets, 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.
an order to an offending party to rid itself of property; it has the purpose of depriving the defendant of the gains of wrongful behavior
“the court found divestiture to be necessary in preventing a monopoly”
the sale by a company of a product line or a subsidiary or a division
Synonyms, antonyms and the broader and narrower relations for divestiture come from Princeton University’s WordNet. Full sources and licences.