Sure! Here are the sentences changed from "in spite of" / "despite" to "although" / "though" / "even though":

1. Although I warned them, they went ahead with their plan.
2. They went swimming although the water was cold.
3. Although she was bad at pool, she beat him three times in a row.
4. She decided to go abroad for a year even though she loved her boyfriend very much.
5. He went on holiday to Thailand even though the airfare was expensive.
6. Socrates never had much money, although he was very famous in his own day.
7. His career did not really take off, although he had ambitions.
8. They managed to work together even though they had differences of opinion.
9. Although I had a headache, I enjoyed the film.
10. Even though he had enough money, he refused to buy a new car.