Yes, stopes is a Scrabble word!

Verb

1. Come to a halt, stop moving

2. Put an end to a state or an activity

3. Stop from happening or developing

4. Interrupt a trip

5. Cause to stop

6. Prevent completion

7. Hold back, as of a danger or an enemy; check the expansion or influence of

8. Seize on its way

9. Have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical

10. Render unsuitable for passage

11. Stop and wait, as if awaiting further instructions or developments

Noun

1. Birth-control campaigner who in 1921 opened the first birth control clinic in London (1880-1958)