exposure has 5 distinct synonyms spread across 2 of its 10 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.
vulnerability to the elements; to the action of heat or cold or wind or rain
“exposure to the weather”
the act of subjecting someone to an influencing experience
“she denounced the exposure of children to pornography”
the disclosure of something secret
“they feared exposure of their campaign plans”
aspect resulting from the direction a building or window faces
“the studio had a northern exposure”
the state of being vulnerable or exposed
“his vulnerability to litigation”
the intensity of light falling on a photographic film or plate
“he used the wrong exposure”
a representation of a person or scene in the form of a print or transparent slide or in digital format
the act of exposing film to light
presentation to view in an open or public manner
“the exposure of his anger was shocking”
abandoning without shelter or protection (as by leaving an infant out in the open)
Synonyms, antonyms and the broader and narrower relations for exposure come from Princeton University’s WordNet. Full sources and licences.