plural vs rariora

plural and rariora both are nouns.

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

plural (noun)	rariora (noun)
the form of a word that is used to denote more than one	(plural) rare collector's items

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