As verbs the difference between scour and flush
is that
scour is to clean, polish, or wash something by scrubbing it vigorously while
flush is to cause to take flight from concealment or
flush can be to cleanse by flooding with generous quantities of a fluid.
As nouns the difference between scour and flush
is that
scour is the removal of sediment caused by swiftly moving water while
flush is a group of birds that have suddenly started up from undergrowth, trees etc or
flush can be a sudden flowing; a rush which fills or overflows, as of water for cleansing purposes or
flush can be (poker) a hand consisting of all cards with the same suit.
As an adjective flush is
smooth, even, aligned; not sticking out.