Nominative vs Vocative - What's the difference?
nominative | vocative |
(grammar) Giving a name; naming; designating; — said of that case or form of a noun which stands as the subject of a finite verb.
Of or pertaining to calling; used in calling or vocation.
(grammar) Used in address; appellative; — said of that case or form of the noun, pronoun, or adjective, in which a person or thing is addressed; as, Domine , O Lord.