felicitation vs plural

felicitation and plural both are nouns.

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

felicitation (noun)	plural (noun)
the act of acknowledging that someone has an occasion for celebration	the form of a word that is used to denote more than one
(usually plural) an expression of pleasure at the success or good fortune of another

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