pair of trousers vs zip

pair of trousers and zip both are nouns.

Word	Noun	Adjective	Verb	Adverb
pair of trousers	Yes	No	No	No
zip	Yes	No	Yes	No

pair of trousers (noun)	zip (noun)
(usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately	a fastener for locking together two toothed edges by means of a sliding tab
	forceful exertion
	a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

pair of trousers (verb)	zip (verb)
	close with a zipper
	move very fast