parts inventory vs inventory

parts inventory and inventory both are nouns.

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

As nouns, inventory is a hypernym of parts inventory; that is, inventory is a word with a broader meaning than parts inventory:

Other hypernyms of parts inventory include stock list.

parts inventory (noun)	inventory (noun)
an inventory of replacement parts	making an itemized list of merchandise or supplies on hand
	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

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