say it: SKOW-ur
scour is a verb and noun meaning "examine minutely". It carries 5 recorded senses.
rub hard or scrub
“scour the counter tops”
a place that is scoured (especially by running water)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for scour come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.