corduroys vs pair of trousers

corduroys and pair of trousers both are nouns.

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

As nouns, pair of trousers is a hypernym of corduroys; that is, pair of trousers is a word with a broader meaning than corduroys:

corduroys: cotton trousers made of corduroy cloth
pair of trousers: (usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately

Other hypernyms of corduroys include pant, trousers.

corduroys (noun)	pair of trousers (noun)
cotton trousers made of corduroy cloth	(usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately