plural form vs knickers

plural form and knickers both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural form	Yes	No	No	No
knickers	Yes	No	No	No

plural form (noun)	knickers (noun)
the form of a word that is used to denote more than one	(used in the plural) underpants worn by women
	(used in the plural) trousers ending above the knee