The Oxford Thesaurus An A-Z Dictionary of Synonyms - scour v.

1) scrub, clean, cleanse, wash, rub, abrade, polish, burnish, buff, shine: The pots were scoured until they shone. 2) scrape (about or around) , rake, comb, turn upside down, search, ransack: I scoured the shops looking in vain for the coffee filters you wanted.