master

We are masters of the sea.

No matter how early I came down, I would find him on the veranda, smoking cigarettes, or otherwise his man would be there with a message to say that his master would shortly join me if I would kindly wait.

Mark Twain was a master of fiction.

Where there are little Maſters and Miſſes in a Houſe, they are uſually great Impediments to the Diverſions of the Servants;

She has a master in psychology.

He is a master of marine biology.

The band couldn't find the master, so they re-recorded their tracks.

The case was tried by a master, who concluded that the plaintiffs were the equitable owners of the property.[…]

a master wheel

The use of masters and submasters will enable suites of rooms to be controlled by one key.

Coordinate term: mistress