Master.

Mark 12:14
"Teacher, " they said, "we know that You are honest and are swayed by no one. Indeed, You are impartial and teach the way of God in accordance with the truth. Now then, is it lawful to pay taxes to Caesar or not? Should we pay them or not?"

Isaiah 1:3
The ox knows its owner, and the donkey its master's manger, but Israel does not know; My people do not understand."

Malachi 1:6
"A son honors his father, and a servant his master. But if I am a father, where is My honor? And if I am a master, where is your fear of Me?" says the LORD of Hosts to you priests who despise My name. Yet you ask, "How have we despised Your name?"

Matthew 23:8-10
But you are not to be called 'Rabbi, ' for you have one Teacher, and you are all brothers. . . .

Luke 6:46
Why do you call Me 'Lord, Lord, ' but not do what I say?

John 13:13, 14
You call Me Teacher and Lord, and rightly so, because I am. . . .

John 20:16
Jesus said to her, "Mary." She turned and said to Him in Aramaic, "Rabboni!" (which means Teacher).