education has 9 distinct synonyms spread across 3 of its 6 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 activities of educating or instructing; activities that impart knowledge or skill
“he received no formal education”
knowledge acquired by learning and instruction
“it was clear that he had a very broad education”
the gradual process of acquiring knowledge
“education is a preparation for life”
the profession of teaching (especially at a school or college or university)
the result of good upbringing (especially knowledge of correct social behavior)
“a woman of breeding and refinement”
the United States federal department that administers all federal programs dealing with education (including federal aid to educational institutions and students); created 1979
Synonyms, antonyms and the broader and narrower relations for education come from Princeton University’s WordNet. Full sources and licences.