feature has 8 distinct synonyms spread across 7 of its 8 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.
a prominent attribute or aspect of something
“the map showed roads and other features”
the principal (full-length) film in a program at a movie theater
“the feature tonight is `Casablanca'”
a special or prominent article in a newspaper or magazine
“they ran a feature on retirement planning”
(linguistics) a distinctive characteristic of a linguistic unit that serves to distinguish it from other units of the same kind
an article of merchandise that is displayed or advertised more than other articles
Synonyms, antonyms and the broader and narrower relations for feature come from Princeton University’s WordNet. Full sources and licences.