constitutionalize has 1 distinct synonym spread across 1 of its 3 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.
provide with a constitution, as of a country
“The United States were constitutionalized in the late 18th century”
take a walk for one's health or to aid digestion, as after a meal
“A good way of exercising is to constitutionalize”
incorporate into a constitution, make constitutional
“A woman's right to an abortion was constitutionalized in the 1970's”
Synonyms, antonyms and the broader and narrower relations for constitutionalize come from Princeton University’s WordNet. Full sources and licences.