practice has 12 distinct synonyms spread across 8 of its 10 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.
translating an idea into action
“a hard theory to put into practice”
the exercise of a profession
“the practice of the law”
knowledge of how something is usually done
“it is not the local practice to wear shorts to dinner”
Synonyms, antonyms and the broader and narrower relations for practice come from Princeton University’s WordNet. Full sources and licences.
engage in a rehearsal (of)