shipwreck has 1 distinct synonym spread across 1 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.
ruin utterly
“You have shipwrecked my career”
cause to experience shipwreck
“They were shipwrecked in one of the mysteries at sea”
Synonyms, antonyms and the broader and narrower relations for shipwreck come from Princeton University’s WordNet. Full sources and licences.
destroy a ship
“The vessel was shipwrecked”
an irretrievable loss
“that was the shipwreck of their romance”