curiosa vs plural

curiosa and plural both are nouns.

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

curiosa (noun)	plural (noun)
books on strange or unusual subjects (especially erotica)	the form of a word that is used to denote more than one

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