repose has 18 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.
put or confide something in a person or thing
“These philosophers reposed the law in the people”
lie when dead
“Mao reposes in his mausoleum”
to put something (eg trust) in something
“The nation reposed its confidence in the King”
freedom from activity (work or strain or responsibility)
“took his repose by the swimming pool”
Synonyms, antonyms and the broader and narrower relations for repose come from Princeton University’s WordNet. Full sources and licences.
the absence of mental stress or anxiety
a disposition free from stress or emotion