want has 10 distinct synonyms spread across 6 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.
hunt or look for; want for a particular reason
“Your former neighbor is wanted by the FBI”
wish or demand the presence of
“I want you here at noon!”
be without, lack; be deficient in
“want courtesy”
the state of needing something that is absent or unavailable
“there is a serious lack of insight into the problem”
Synonyms, antonyms and the broader and narrower relations for want come from Princeton University’s WordNet. Full sources and licences.