rudiments vs plural

rudiments and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
rudiments	Yes	No	No	No
plural	Yes	Yes	No	No

rudiments (noun)	plural (noun)
the elementary stages of any subject (usually plural)	the form of a word that is used to denote more than one
a statement of fundamental facts or principles

rudiments (adjective)	plural (adjective)
	grammatical number category referring to two or more items or units
	composed of more than one member, set, or kind