inventory vs stocktake

inventory and stocktake both are nouns.

Word	Noun	Adjective	Verb	Adverb
inventory	Yes	No	Yes	No
stocktake	Yes	No	No	No

As nouns, stocktake is a hyponym of inventory; that is, stocktake is a word with a more specific, narrower meaning than inventory:

Other hyponyms of inventory include stock-take.

inventory (noun)	stocktake (noun)
making an itemized list of merchandise or supplies on hand	an instance of stocktaking
the merchandise that a shop has on hand
a collection of resources
a detailed list of all the items in stock
(accounting) the value of a firm's current assets including raw materials and work in progress and finished goods

inventory (verb)	stocktake (verb)
make or include in an itemized record or report