item has 4 distinct synonyms spread across 4 of its 6 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.
1 of the 6 recorded senses carries no synonym, antonym or related term, so it is not shown above. Every sense, with its definition and examples, is on the full entry for item.
Synonyms, antonyms and the broader and narrower relations for item come from Princeton University’s WordNet. Full sources and licences.
a small part that can be considered separately from the whole
“it was perfect in all details”
a whole individual unit; especially when included in a list or collection
“they reduced the price on many items”
an isolated fact that is considered separately from the whole
“several of the details are similar”
an individual instance of a type of symbol
“the word `error' contains three tokens of `r'”