smooth-spoken vs vocative

smooth-spoken

• Having a pleasant-sounding voice. 

• Flattering. 

• Plausible. 

vocative

• The vocative case 

• A word in the vocative case 

• Something said to (or as though to) a particular person or thing; an entreaty, an invocation. 

• Of or pertaining to calling; used in calling or vocation. 

• Used in address; appellative (said of that case or form of the noun, pronoun, or adjective, in which a person or thing is addressed). For example "Domine, O Lord"