scouring

nouns

moving over territory to search for something
"scouring the entire area revealed nothing"
scouring
is derived from
scour
is a type of (narrower)
the activity of looking thoroughly in order to find something or someone
hunt, hunting, search
the act of cleaning a surface by rubbing it with a brush and soap and water
scouring, scrub, scrubbing
is derived from
scour