irons vs plural

irons and plural both are nouns.

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

irons (noun)	plural (noun)
metal shackles; for hands or legs	the form of a word that is used to denote more than one

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