Here are the correct forms of the words in brackets:

1. Their children have quite **different** characters. (DIFFERENCE)
2. My brother bought a new **fishing** rod yesterday. (FISH)
3. Mr. Pike runs his business very **successfully**. (SUCCESS)
4. I like the city life because there are many kinds of **entertainment**. (ENTERTAIN)
5. The scouts do the **volunteering** work. (VOLUNTEER)
6. Is there anything **interesting** on TV tonight? (INTEREST)
7. What is the **meaning** of this word? (MEAN)
8. My uncle often spends his free time doing volunteer work at a local **orphanage**. (ORPHAN)
9. Relax for some minutes and you’ll feel more **comfortable**. (COMFORT)
10. She is one of the greatest **performers** to appear in this theater. (PERFORM)