castanets vs plural

castanets and plural both are nouns.

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

castanets (noun)	plural (noun)
(used in the plural) a percussion instrument consisting of a pair of hollow pieces of wood or bone (usually held between the thumb and fingers) that are made to click together (as by Spanish dancers) in rhythm with the dance	the form of a word that is used to denote more than one

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