relation vs plural

relation and plural both are nouns.

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

relation (noun)	plural (noun)
an abstraction belonging to or characteristic of two entities or parts together	the form of a word that is used to denote more than one
(usually plural) mutual dealings or connections among persons or groups
sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur
(law) the principle that an act done at a later time is deemed by law to have occurred at an earlier time
an act of narration
a person related by blood or marriage

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