Nouns:
1. Cat
2. Happiness
3. Tree
4. City
5. Dream
Pronouns:
1. He
2. She
3. They
4. It
5. We
Verbs:
1. Run
2. Sing
3. Think
4. Eat
5. Sleep
Adverbs:
1. Quickly
2. Slowly
3. Happily
4. Loudly
5. Carefully
Conjunctions:
1. And
2. But
3. Or
4. Because
5. So
Interjections:
1. Wow!
2. Ouch!
3. Oops!
4. Hey!
5. Hurray!
Prepositions:
1. On
2. In
3. Under
4. Over
5. Through