provide has 11 distinct synonyms spread across 5 of its 7 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.
determine (what is to happen in certain contingencies), especially by including a proviso condition or stipulation
“The will provides that each child should receive half of the money”
supply means of subsistence; earn a living
“He provides for his large family by working three jobs”
take measures in preparation for
“provide for the proper care of the passengers on the cruise ship”
Synonyms, antonyms and the broader and narrower relations for provide come from Princeton University’s WordNet. Full sources and licences.