WordNet records no synonym and no antonym for rustication. 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.
the condition naturally attaching to life in the country
the construction of masonry or brickwork in a rustic manner
the action of retiring to and living in the country
Synonyms, antonyms and the broader and narrower relations for rustication come from Princeton University’s WordNet. Full sources and licences.
temporary dismissal of a student from a university