high jinks vs plural

high jinks and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
high jinks	Yes	No	No	No
plural	Yes	Yes	No	No

high jinks (noun)	plural (noun)
noisy and mischievous merrymaking	the form of a word that is used to denote more than one

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