firework vs plural form

firework and plural form both are nouns.

Word	Noun	Adjective	Verb	Adverb
firework	Yes	No	No	No
plural form	Yes	No	No	No

firework (noun)	plural form (noun)
(usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc.	the form of a word that is used to denote more than one