Practice is the noun. Practise is the verb. "I have to leave my law practice for a couple of days to practise for the baseball tournament."

Imperialism is the practice of taking control of weaker nations.

There is a saying: "Practice makes perfect." Is that what you want?

practice paper on navodaya vidyalaya entrance exam?

The best way to prepare for a GED test is to practice. You can make flash cards for the vocabulary and any definitions that you might have, and you can print practice math problems so that you will know some of the topics before the test. The more practice that you can get in before the final test, the better that you will probably do.