scour in WordNet English dictionary

1. rub hard or scrub
   "scour the counter tops"
   scour  abrade 
   
2. rinse, clean, or empty with a liquid
   "flush the wound with antibiotics"; "purge the old gas tank"
   flush  scour  purge 
   
3. clean with hard rubbing
   "She scrubbed his back"
   scrub  scour 
   
4. examine minutely
   "The police scoured the country for the fugitive"
   scour 
   

1. a place that is scoured (especially by running water)
   scour