knickerbockers vs breeches

knickerbockers and breeches both are nouns.

Word	Noun	Adjective	Verb	Adverb
knickerbockers	Yes	No	No	No
breeches	Yes	No	No	No

As nouns, knickerbockers and breeches are synonyms defined as:

knickerbockers and breeches: (used in the plural) trousers ending above the knee

Other synonyms of knickerbockers include knee breeches, knee pants, knickers.

knickerbockers (noun)	breeches (noun)
(used in the plural) trousers ending above the knee	(used in the plural) trousers ending above the knee