buckskins vs knickers

buckskins and knickers both are nouns.

Word	Noun	Adjective	Verb	Adverb
buckskins	Yes	No	No	No
knickers	Yes	No	No	No

As nouns, knickers is a hypernym of buckskins; that is, knickers is a word with a broader meaning than buckskins:

Other hypernyms of buckskins include breeches, knee breeches, knee pants, knickerbockers.

buckskins (noun)	knickers (noun)
(used in the plural) breeches made of buckskin	(used in the plural) underpants worn by women
	(used in the plural) trousers ending above the knee