provision has 6 distinct synonyms spread across 4 of its 5 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 activity of supplying or providing something
the cognitive process of thinking about what you will do in the event of something happening
“his planning for retirement was hindered by several uncertainties”
a store or supply of something (especially of food or clothing or arms)
Synonyms, antonyms and the broader and narrower relations for provision come from Princeton University’s WordNet. Full sources and licences.