chinos vs trousers

chinos and trousers both are nouns.

Word	Noun	Adjective	Verb	Adverb
chinos	Yes	No	No	No
trousers	Yes	No	No	No

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

chinos: (plural) trousers made with chino cloth
trousers: (usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately

Other hypernyms of chinos include pair of trousers, pant.

chinos (noun)	trousers (noun)
(plural) trousers made with chino cloth	(usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately