Here is a list of idiomatic expressions using the word over.

All over again

If something happens all over again, the whole process happens again.

The master was not happy with the way the boy cleaned the stable. He made him do it all over again.

Hit / beat / knock somebody over the head

To deliberately hit the top of someone’s head with something

She hit him over the head with a bottle.

Over and above

In addition to something that already exists

Top business executives receive shares over and above their basic salaries.

These perks are over and above the basic salaries.

Over and over (again)

If something happens over and over again, it happens many times.

I read the report over and over (again); still, I didn’t understand anything.

They drove him crazy by asking the same questions over and over again.

Over against

This expression is used when you are comparing two things to emphasize the difference.

I was impressed by her confidence and smartness over against her brother’s timidity.

Twice over/three times over

If you do something twice over, you do it twice.

We have already got enough weapons to destroy the whole earth ten times over.

Go over to

To go over to is to change from one thing to another.

We went over to mobile banking because it saved time and money.