toreador pants vs trousers

toreador pants and trousers both are nouns.

Word	Noun	Adjective	Verb	Adverb
toreador pants	Yes	No	No	No
trousers	Yes	No	No	No

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

toreador pants: (used in the plural) snug trousers ending at the calves; worn by women and girls
trousers: (usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately

Other hypernyms of toreador pants include pair of trousers, pant.

toreador pants (noun)	trousers (noun)
(used in the plural) snug trousers ending at the calves; worn by women and girls	(usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately