inventory has 9 distinct synonyms spread across 5 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.
a detailed list of all the items in stock
the merchandise that a shop has on hand
“they carried a vast inventory of hardware”
(accounting) the value of a firm's current assets including raw materials and work in progress and finished goods
making an itemized list of merchandise or supplies on hand
“an inventory may be necessary to see if anything is missing”
make or include in an itemized record or report
“Inventory all books before the end of the year”
Synonyms, antonyms and the broader and narrower relations for inventory come from Princeton University’s WordNet. Full sources and licences.