plural form vs riding breeches

plural form and riding breeches both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural form	Yes	No	No	No
riding breeches	Yes	No	No	No

plural form (noun)	riding breeches (noun)
the form of a word that is used to denote more than one	(used in the plural) flared trousers ending at the calves; worn with riding boots