Yes, showed is a Scrabble word!

Verb

1. Give an exhibition of to an interested audience

2. Establish the validity of something, as by an example, explanation or experiment

3. Provide evidence for

4. Make visible or noticeable

5. Show in, or as in, a picture

6. Give expression to

7. Indicate a place, direction, person, or thing; either spatially or figuratively

8. Be or become visible or noticeable

9. Indicate a certain reading; of gauges and instruments

10. Give evidence of, as of records

11. Take (someone) to their seats, as in theaters or auditoriums

12. Finish third or better in a horse or dog race