take off has 12 distinct synonyms spread across 5 of its 9 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.
mimic or imitate in an amusing or satirical manner
“This song takes off from a famous aria”
get started or set in motion, used figuratively
“the project took a long time to get off the ground”
Synonyms, antonyms and the broader and narrower relations for take off come from Princeton University’s WordNet. Full sources and licences.