The 'sir' group
These nouns are used to address someone in a polite way.
gentlemen ladies ma'am madam maestro master Miss sir
Ladies and gentlemen, owing to the indisposition of one of our actors, tonight's performance of The Messiah has been cancelled.
Yes, sir, what can we do for you?
Two nouns are used to show respect when addressing God.
Lord, we ask this in Jesus' name. Amen.