Here are the correct forms of the given words:

1. It is **unhealthy** for young children to eat too much candy. (HEALTH)
2. Do you know what this flower is a **symbol** of? (SYMBOL)
3. She's going to hospital for a **check-up**. (MEDICINE)
4. All these **musical** instruments belong to our music teacher. (MUSIC)
5. That **artistic** student has just painted wonderful pictures. (ARTIST)
6. **Unfortunately**, we didn't manage to pass the final test. (LUCK)
7. **Traditionally**, this dish is cooked with coconut and beans. (TRADITION)
8. The campaign managed to raise $20,000 through online **donations**. (DONATE)