salutation vs plural

salutation and plural both are nouns.

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

salutation (noun)	plural (noun)
(usually plural) an acknowledgment or expression of good will (especially on meeting)	the form of a word that is used to denote more than one
an act of honor or courteous recognition
word of greeting used to begin a letter

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