delivery has 10 distinct synonyms spread across 6 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.
the act of delivering or distributing something (as goods or mail)
“his reluctant delivery of bad news”
the event of giving birth
“she had a difficult delivery”
your characteristic style or manner of expressing yourself orally
“his manner of speaking was quite abrupt”
the voluntary transfer of something (title or possession) from one party to another
recovery or preservation from loss or danger
“work is the deliverance of mankind”
Synonyms, antonyms and the broader and narrower relations for delivery come from Princeton University’s WordNet. Full sources and licences.