administer, minister

Administer or administer means

Minister or minister means

Minister or minister may also mean

Now that you know that, you can say --

minister, minster

Minister or minister means a parson, a preacher, or, in some countries, the head of a government department--
They will be married at home, by the minister of their church.
In the United States, we have a Secretary of State; in Britain, they have a Foreign Minister.

Minster or minster, most commonly used in England,  means a large or important church, such as a cathedral--
You can see the spire of the minster from the top of that hill.
The old minster lay in ruins, looking like the scene of a medieval romance.

Now that you know that, you can say--
"The old minister has been preaching at this minster every Sunday for more than forty years."