Yes, worlds is a Scrabble word!

Noun

1. Everything that exists anywhere

2. People in general; especially a distinctive group of people with some shared interest

3. All of your experiences that determine how things appear to you

4. The 3rd planet from the sun; the planet we live on

5. People in general considered as a whole

6. A part of the earth that can be considered separately

7. The concerns of this life as distinguished from heaven and the afterlife

8. All of the living human inhabitants of the earth